Vaporizer devices with blow discrimination

ABSTRACT

Methods and apparatuses for discriminating between user blowing and drawing (sucking) in an electronic vaporization device. Described herein are electronic aerosol devices and methods of controlling or operating them which can accurately differentiate between blowing and drawing (sucking) through the mouthpiece and adjust the control of the vaporizer accordingly.

CROSS REFERENCE TO RELATED APPLICATIONS

This patent application claims priority to U.S. provisional patentapplication No. 62/294,271, titled “VAPORIZER DEVICES WITH BLOWDISCRIMINATION,” filed on Feb. 11, 2016 which is herein incorporated byreference in its entirety.

This patent application may be related to U.S. patent application Ser.No. 14/581,666, filed on Dec. 23, 2014, and titled “VAPORIZATION DEVICESYSTEMS AND METHODS”, which claimed priority to U.S. Provisional PatentApplication No. 61/920,225, filed Dec. 23, 2013, U.S. Provisional PatentApplication No. 61/936,593, filed Feb. 6, 2014, and U.S. ProvisionalPatent Application No. 61/937,755, filed Feb. 10, 2014.

This application may also be related to or may be used with theinventions in one or more of the following patent applications: U.S.patent application Ser. No. 14/578,193, filed on Dec. 19, 2014, andtitled “METHOD AND SYSTEM FOR VAPORIZATION OF A SUBSTANCE”; U.S. patentapplication Ser. No. 14/625,042, filed on Feb. 18, 2015, and titled“AEROSOL DEVICES AND METHODS FOR INHALING A SUBSTANCE AND USES THEREOF”;U.S. patent application Ser. No. 13/837,438, filed on Mar. 15, 2013, andtitled “LOW TEMPERATURE ELECTRONIC VAPORIZATION DEVICE AND METHODS”;U.S. patent application Ser. No. 14/271,071, filed on May 6, 2014, andtitled “NICOTINE SALT FORMULATIONS FOR AEROSOL DEVICES AND METHODSTHEREOF”; U.S. patent application Ser. No. 14/304,847, filed on Jun. 13,2014, and titled “MULTIPLE HEATING ELEMENTS WITH SEPARATE VAPORIZABLEMATERIALS IN AN ELECTRIC VAPORIZATION DEVICE”; U.S. patent applicationSer. No. 14/461,284, filed on Aug. 15, 2014, and titled “METHODS ANDDEVICES FOR DELIVERING AND MONITORING OF TOBACCO, NICOTINE, OR OTHERSUBSTANCES”; PCT Patent Application No. PCT/US2015/031152, filed on May15, 2015, and titled “SYSTEMS AND METHODS FOR AEROSOLIZING A SMOKABLEMATERIAL”; PCT Patent Application No. PCT/US2014/064690, filed on Nov.7, 2014, and titled “NICOTINE LIQUID FORMULATIONS FOR AEROSOL DEVICESAND METHODS THEREOF”; U.S. patent application Ser. No. 14/960,259, filedon Dec. 4, 2015, and titled “CALIBRATED DOSE CONTROL”; U.S. patentapplication Ser. No. 15/257,748, titled “CARTRIDGE FOR USE WITH AVAPORIZER DEVICE,” filed on Sep. 6, 2016; U.S. patent application Ser.No. 15/257,760, titled “VAPORIZER APPARATUS,” filed on Sep. 6, 2016;U.S. patent application Ser. No. 15/257,768, titled “VAPORIZERAPPARATUS,” filed on Sep. 6, 2016; U.S. patent application Ser. No.15/379,898, titled “VAPORIZATION DEVICE SYSTEMS AND METHODS,” filed onDec. 15, 2016; U.S. patent application Ser. No. 15/309,554, titled“SYSTEMS AND METHODS FOR AEROSOLIZING A SMOKABLE MATERIAL,” filed onNov. 8, 2016; U.S. patent application Ser. No. 15/101,303, titled“NICOTINE LIQUID FORMULATIONS FOR AEROSOL DEVICES AND METHODS THEREOF,”filed on Jun. 2, 2016; U.S. patent application Ser. No. 14/960,259,titled “CALIBRATED DOSE CONTROL,” filed on Dec. 4, 2015; U.S. patentapplication Ser. No. 15/396,584, titled “LEAK-RESISTANT VAPORIZERCARTRIDGES FOR USE WITH CANNABINOIDS,” filed on Dec. 31, 2016. Each ofthese applications is herein incorporated by reference in theirentirety.

INCORPORATION BY REFERENCE

All publications and patent applications mentioned in this specificationare herein incorporated by reference in their entirety to the sameextent as if each individual publication or patent application wasspecifically and individually indicated to be incorporated by reference.

FIELD

Described herein are electronic inhalable aerosol devices, or electronicvaping devices, and particularly electronic aerosol devices which canaccurately differentiate between blowing and drawing (sucking) throughthe mouthpiece and adjust the control of the vaporizer accordingly.

BACKGROUND

Electronic cigarettes are typically battery-powered vaporizers thatsimulate the feeling of smoking, but without tobacco. Instead ofcigarette smoke, the user inhales an aerosol, commonly called vapor,typically released by a heating element that atomizes a liquid solution(vaporizable material or solution). Typically, the user activates thee-cigarette by taking a puff or pressing a button. Some vaporizers looklike traditional cigarettes, but they come in many variations.

Many electronic cigarettes use a pressure sensor to determine when thedevice should be heating or not. This may allow for an intuitive userinterface where the user simply draws from (sucks on) the device topower it. It is advantageous over powering the device with a button inthat the device's heating element is only powered when there is airflowover it assuming the device's pressure sensor and microcontroller canaccurately detect the start and end of a draw.

Unfortunately, the vast majority of electronic cigarettes described andcurrently in use have an unexpected failure mode which may reduce thelife of the battery and the overall device. Specifically, such devicesmay inadvertently (and transiently) detect a draw or inhalationfollowing blowing or exhalation through the device. A recent test ofnumerous pressure sensor-based electronic cigarettes currently on themarket found that these devices can easily be turned on and apply powerto the heating element by blowing rather than inhaling into themouthpiece of the device as if the user had drawn from the device.Specifically, such devices falsely indicate a draw (inhalation) andactivate the heater at the end of a blow into the device because theydetect a pressure drop at the end of the blow, and falsely interpretthis is the start of a draw. Depending on the controller for thevaporizer, this pressure drop at the end of a blow may power the heaterfor some amount of time, and potentially until a timeout for max drawtime. This failure mode may result in the device heating without theuser drawing on it, which pay provide a non-ideal user experience, maywaste of battery life and vaporizable material, and in devices withouttemp control may overheat the vaporizable material, which can producee-juice degradants that taste bad and are potentially more harmful whenvaporized that the original contents of the e-juice formulation.

Many commercially available electronic cigarettes use pressure sensorsthat are mechanically similar to electret microphones, but packaged withan ASIC (application specific integrated circuit) instead of a standardelectret microphone circuit. An electret microphone is an electrostaticcapacitor-based microphone that does not require a polarizing powersupply. Pressure sensors of this type typically accept two power signalsand have one output signal to indicate whether or not a pressure dropwas recently detected. For the pressure sensor's ASIC to accommodatechanges in environment conditions (humidity and temperature), slightdifferences in mechanical assembly from sensor to sensor, and potentialshifting of parts in the mechanical assembly from vibration or drop, theASIC's output usually depends on changes in capacitance between thesensor's conductive diaphragm (which deflects with a pressuredifferential across it) and a conductive static plate in the sensorinstead of depending on absolute measured capacitance crossing somethreshold. Given that not all measured pressure drops indicate that theuser is drawing from the device, this approach is not ideal.

In all electronic cigarettes tested (some of which may not use thestandard modified electret microphone with ASIC), the device can be madeto start heating at the end of a blow into the device's air/vaporoutlet. In devices in which direct capacitance measurements may be madeby the microcontroller, the same behavior can be produced, meaning thereis no software actively handling blows into the device correctly.

This failure mode may be largely unnoticed, but it is relevant based onmany user practices. For example, some electronic cigarette users holddevices in their mouths, resulting in blowing into the device. Devicesthat don't adequately distinguish between drawing and the end of ablowing into the mouthpiece may start heating after a user has exhaledonto the device.

Described herein are apparatuses (systems and devices) and methods thatmay address the problem identified above.

SUMMARY OF THE DISCLOSURE

The present invention relates generally to apparatuses, includingsystems and devices, for vaporizing material to form an inhalableaerosol. Specifically, these apparatuses may include vaporizers.

In particular, described herein are apparatuses including vaporizersthat are adapted to prevent one or more failure modes that may resultfrom blowing into the mouthpiece, which may be referred to herein asblow rejection or blow discrimination. In general, such vaporizers andmethods of operating a vaporizer may include a pressure sensor thatregulates the baseline pressure readings (which may be actual pressurereadings or may be unconverted sensor readings, such as capacitancemeasurements) during a blow and/or a draw through the mouthpiece toprevent instability that may otherwise result from blowing into themouthpiece.

For example, described herein are vaporizer devices comprising: areservoir configured to hold a vaporizable material; a heater configuredto heat the vaporizable material; a mouthpiece in communication with thereservoir; a pressure sensor comprising a differential pressure sensor(e.g., MEMS, capacitive membrane, etc.) configured to outputinstantaneous sensor readings; and a microcontroller, wherein themicrocontroller is configured to: determine a baseline based onfiltering the instantaneous sensor readings; hold the baseline at aprior value of the baseline while the instantaneous sensor readings areabove the baseline by a first offset value or below the baseline by asecond offset value; compare the instantaneous sensor readings to thebaseline and activate the heater to generate vapor from the vaporizablematerial when the instantaneous sensor readings are offset from thebaseline by more than a third offset value indicating suction is beingapplied to the mouthpiece.

A vaporizer device may include a reservoir configured to hold avaporizable material; a heater configured to heat the vaporizablematerial; a mouthpiece in communication with the reservoir; a pressuresensor configured to output instantaneous sensor readings; and amicrocontroller, wherein the microcontroller is configured to: determinea baseline based on filtering the instantaneous sensor readings; holdthe baseline at a prior value of the baseline while the instantaneoussensor readings are above the baseline by a first offset value or belowthe baseline by a second offset value; compare the instantaneous sensorreadings to the baseline and activate the heater to generate vapor fromthe vaporizable material when the instantaneous sensor readings arebelow the baseline by more than a third offset value indicating suctionis being applied to the mouthpiece.

A vaporizer device may include: a reservoir configured to hold avaporizable material; a heater configured to heat the vaporizablematerial; a mouthpiece in communication with the reservoir; a pressuresensor configured to output instantaneous sensor readings; and amicrocontroller, wherein the microcontroller is configured to: determinea baseline based on filtering the instantaneous sensor readings; holdthe baseline at a prior value of the baseline while the instantaneoussensor readings are above the baseline by a first offset value or belowthe baseline by a second offset value; compare the instantaneous sensorreadings to the baseline and activate the heater to generate vapor fromthe vaporizable material when the instantaneous sensor readings areabove the baseline by more than a third offset value indicating suctionis being applied to the mouthpiece.

The first side of the pressure sensor may be exposed to a first air paththrough the mouthpiece and a second side of the pressure sensor isexposed to a second air path open to ambient pressure, and wherein thesecond air path is sealed from the first air path by a gasket around thepressure sensor. The third offset value may be the same as the secondoffset value or the third offset value may be the same as the firstoffset value. The first offset value may be zero, or the second offsetvalue is zero.

The instantaneous pressure sensor output may be capacitance or pressure.

In general, the pressure sensors described herein may be anydifferential pressure sensor, such as MEMS, capacitive pressures sensors(e.g., including a capacitive membrane), or any force collector typepressure sensors that use a transducer to measure pressure or pressuredifferences (e.g., diaphragm, piston, etc.), piezorestrictive,electromagnetic, piezoelectric, optical, potentiometric, resonant(including MEMS), etc. Differential pressure sensors may measure thedistance between two pressures, one connected on different sides of thesensor. This includes pressure sensors in which one side isopen/connected to ambient atmosphere (pressure).

The microcontroller may be configured to determine the baseline based onfiltering the instantaneous sensor output by low pass filtering theinstantaneous sensor output.

The microcontroller may be configured to determine the baseline based onfiltering the instantaneous sensor output by taking a running average ofthe instantaneous sensor output.

The microcontroller may further be configured to stop activating theheater to generate vapor when the instantaneous sensor output is offsetfrom the baseline by less than the third offset value.

Also described herein are methods of controlling a vaporizer device toprevent heating after blowing on a mouthpiece of the vaporizer devicethat include: taking instantaneous sensor readings from a pressuresensor in the vaporizer device, wherein the pressure sensor comprises acapacitive membrane; determining a baseline by filtering theinstantaneous sensor readings; holding the baseline at a prior value ofthe baseline while the instantaneous sensor readings are above thebaseline by a first offset value; holding the baseline at a prior valueof the baseline while the instantaneous sensor readings are below thebaseline by a second offset value; comparing the instantaneous sensorreadings to the baseline and activating a heater in the vaporizer togenerate vapor from a vaporizable material when the instantaneous sensoroutput is offset from the baseline by more than a third offset value,indicating that suction is being applied to the mouthpiece.

A method of controlling a vaporizer device to prevent heating afterblowing on a mouthpiece of the vaporizer device may include: takinginstantaneous sensor readings from a pressure sensor in the vaporizerdevice, wherein the pressure sensor comprises a capacitive membrane;determining a baseline by filtering the instantaneous sensor readings;holding the baseline at a prior value of the baseline while theinstantaneous sensor readings are above the baseline; holding thebaseline at a prior value of the baseline while the instantaneous sensorreadings are below the baseline by an offset value; comparing theinstantaneous sensor readings to the baseline and activating a heater inthe vaporizer to generate vapor from a vaporizable material when theinstantaneous sensor output is below the baseline by more than theoffset value indicating that suction is being applied to the mouthpiece.

In some variations, the apparatuses described herein may include aninhalable aerosol comprising: an oven comprising an oven chamber and aheater for heating a vapor forming medium in the oven chamber togenerate a vapor; a condenser comprising a condensation chamber in whichat least a fraction of the vapor condenses to form the inhalableaerosol; an air inlet that originates a first airflow path that includesthe oven chamber; and an aeration vent that originates a second airflowpath that allows air from the aeration vent to join the first airflowpath prior to or within the condensation chamber and downstream from theoven chamber thereby forming a joined path, wherein the joined path isconfigured to deliver the inhalable aerosol formed in the condensationchamber to a user.

The oven may be within a body of the device. The device may furthercomprise a mouthpiece, wherein the mouthpiece comprises at least one ofthe air inlet, the aeration vent, and the condenser. The mouthpiece maybe separable from the oven. The mouthpiece may be integral to a body ofthe device, wherein the body comprises the oven. The device may furthercomprise a body that comprises the oven, the condenser, the air inlet,and the aeration vent. The mouthpiece may be separable from the body.

In some variations, the oven chamber may comprise an oven chamber inletand an oven chamber outlet, and the oven further comprises a first valveat the oven chamber inlet, and a second valve at the oven chamberoutlet. The aeration vent may comprise a third valve. The first valve,or said second valve may be chosen from the group of a check valve, aclack valve, a non-return valve, and a one-way valve. The third valvemay be chosen from the group of a check valve, a clack valve, anon-return valve, and a one-way valve. The first or second valve may bemechanically actuated. The first or second valve may be electronicallyactuated. The first valve or second valve may be manually actuated. Thethird valve may be mechanically actuated. The third valve may bemechanically actuated. The third valve may be electronically actuated.The third valve may be manually actuated.

In some variations, the device may further comprise a body thatcomprises at least one of: a power source, a printed circuit board, aswitch, and a temperature regulator. The device may further comprise atemperature regulator in communication with a temperature sensor. Thetemperature sensor may be the heater. The power source may berechargeable. The power source may be removable. The oven may furthercomprise an access lid. The vapor forming medium may comprise tobacco.The vapor forming medium may comprise a botanical. The vapor formingmedium may be heated in the oven chamber wherein the vapor formingmedium may comprise a humectant to produce the vapor, wherein the vaporcomprises a gas phase humectant. The vapor may be mixed in thecondensation chamber with air from the aeration vent to produce theinhalable aerosol comprising particle diameters of average size of about1 micron. The vapor forming medium may be heated in the oven chamber,wherein the vapor is mixed in the condensation chamber with air from theaeration vent to produce the inhalable aerosol comprising particlediameters of average size of less than or equal to 0.9 micron. The vaporforming medium may be heated in the oven chamber, wherein the vapor ismixed in the condensation chamber with air from the aeration vent toproduce the inhalable aerosol comprising particle diameters of averagesize of less than or equal to 0.8 micron. The vapor forming medium maybe heated in the oven chamber, wherein the vapor is mixed in thecondensation chamber with air from the aeration vent to produce theinhalable aerosol comprising particle diameters of average size of lessthan or equal to 0.7 micron. The vapor forming medium may be heated inthe oven chamber, wherein the vapor is mixed in the condensation chamberwith air from the aeration vent to produce the inhalable aerosolcomprising particle diameters of average size of less than or equal to0.6 micron. The vapor forming medium may be heated in the oven chamber,wherein the vapor is mixed in the condensation chamber with air from theaeration vent to produce the inhalable aerosol comprising particlediameters of average size of less than or equal to 0.5 micron.

In some variations, the humectant may comprise glycerol as avapor-forming medium. The humectant may comprise vegetable glycerol. Thehumectant may comprise propylene glycol. The humectant may comprise aratio of vegetable glycerol to propylene glycol. The ratio may be about100:0 vegetable glycerol to propylene glycol. The ratio may be about90:10 vegetable glycerol to propylene glycol. The ratio may be about80:20 vegetable glycerol to propylene glycol. The ratio may be about70:30 vegetable glycerol to propylene glycol. The ratio may be about60:40 vegetable glycerol to propylene glycol. The ratio may be about50:50 vegetable glycerol to propylene glycol. The humectant may comprisea flavorant. The vapor forming medium may be heated to its pyrolytictemperature. The vapor forming medium may heated to 200° C. at most. Thevapor forming medium may be heated to 160° C. at most. The inhalableaerosol may be cooled to a temperature of about 50°-70° C. at most,before exiting the aerosol outlet of the mouthpiece.

Also described herein are methods for generating an inhalable aerosol.Such a method may comprise: providing an inhalable aerosol generatingdevice wherein the device comprises: an oven comprising an oven chamberand a heater for heating a vapor forming medium in the oven chamber andfor forming a vapor therein; a condenser comprising a condensationchamber in which the vapor forms the inhalable aerosol; an air inletthat originates a first airflow path that includes the oven chamber; andan aeration vent that originates a second airflow path that allows airfrom the aeration vent to join the first airflow path prior to or withinthe condensation chamber and downstream from the oven chamber therebyforming a joined path, wherein the joined path is configured to deliverthe inhalable aerosol formed in the condensation chamber to a user.

The oven may be within a body of the device. The device may furthercomprise a mouthpiece, wherein the mouthpiece comprises at least one ofthe air inlet, the aeration vent, and the condenser. The mouthpiece maybe separable from the oven. The mouthpiece may be integral to a body ofthe device, wherein the body comprises the oven. The method may furthercomprise a body that comprises the oven, the condenser, the air inlet,and the aeration vent. The mouthpiece may be separable from the body.

The oven chamber may comprise an oven chamber inlet and an oven chamberoutlet, and the oven further comprises a first valve at the oven chamberinlet, and a second valve at the oven chamber outlet.

The vapor forming medium may comprise tobacco. The vapor forming mediummay comprise a botanical. The vapor forming medium may be heated in theoven chamber wherein the vapor forming medium may comprise a humectantto produce the vapor, wherein the vapor comprises a gas phase humectant.The vapor may comprise particle diameters of average mass of about 1micron. The vapor may comprise particle diameters of average mass ofabout 0.9 micron. The vapor may comprise particle diameters of averagemass of about 0.8 micron. The vapor may comprise particle diameters ofaverage mass of about 0.7 micron. The vapor may comprise particlediameters of average mass of about 0.6 micron. The vapor may compriseparticle diameters of average mass of about 0.5 micron.

In some variations, the humectant may comprise glycerol as avapor-forming medium. The humectant may comprise vegetable glycerol. Thehumectant may comprise propylene glycol. The humectant may comprise aratio of vegetable glycerol to propylene glycol. The ratio may be about100:0 vegetable glycerol to propylene glycol. The ratio may be about90:10 vegetable glycerol to propylene glycol. The ratio may be about80:20 vegetable glycerol to propylene glycol. The ratio may be about70:30 vegetable glycerol to propylene glycol. The ratio may be about60:40 vegetable glycerol to propylene glycol. The ratio may be about50:50 vegetable glycerol to propylene glycol. The humectant may comprisea flavorant. The vapor forming medium may be heated to its pyrolytictemperature. The vapor forming medium may heated to 200° C. at most. Thevapor forming medium may be heated to 160° C. at most. The inhalableaerosol may be cooled to a temperature of about 50°-70° C. at most,before exiting the aerosol outlet of the mouthpiece.

The device may be user serviceable. The device may not be userserviceable.

A method for generating an inhalable aerosol may include: providing avaporization device, wherein said device produces a vapor comprisingparticle diameters of average mass of about 1 micron or less, whereinsaid vapor is formed by heating a vapor forming medium in an ovenchamber to a first temperature below the pyrolytic temperature of saidvapor forming medium, and cooling said vapor in a condensation chamberto a second temperature below the first temperature, before exiting anaerosol outlet of said device.

A method of manufacturing a device for generating an inhalable aerosolmay include: providing said device comprising a mouthpiece comprising anaerosol outlet at a first end of the device; an oven comprising an ovenchamber and a heater for heating a vapor forming medium in the ovenchamber and for forming a vapor therein, a condenser comprising acondensation chamber in which the vapor forms the inhalable aerosol, anair inlet that originates a first airflow path that includes the ovenchamber and then the condensation chamber, an aeration vent thatoriginates a second airflow path that joins the first airflow path priorto or within the condensation chamber after the vapor is formed in theoven chamber, wherein the joined first airflow path and second airflowpath are configured to deliver the inhalable aerosol formed in thecondensation chamber through the aerosol outlet of the mouthpiece to auser.

The method may further comprise providing the device comprising a powersource or battery, a printed circuit board, a temperature regulator oroperational switches.

A device for generating an inhalable aerosol may comprise a mouthpiececomprising an aerosol outlet at a first end of the device and an airinlet that originates a first airflow path; an oven comprising an ovenchamber that is in the first airflow path and includes the oven chamberand a heater for heating a vapor forming medium in the oven chamber andfor forming a vapor therein; a condenser comprising a condensationchamber in which the vapor forms the inhalable aerosol; and an aerationvent that originates a second airflow path that allows air from theaeration vent to join the first airflow path prior to or within thecondensation chamber and downstream from the oven chamber therebyforming a joined path, wherein the joined path is configured to deliverthe inhalable aerosol formed in the condensation chamber through theaerosol outlet of the mouthpiece to a user.

A device for generating an inhalable aerosol may comprise: a mouthpiececomprising an aerosol outlet at a first end of the device, an air inletthat originates a first airflow path, and an aeration vent thatoriginates a second airflow path that allows air from the aeration ventto join the first airflow path; an oven comprising an oven chamber thatis in the first airflow path and includes the oven chamber and a heaterfor heating a vapor forming medium in the oven chamber and for forming avapor therein; and a condenser comprising a condensation chamber inwhich the vapor forms the inhalable aerosol and wherein air from theaeration vent joins the first airflow path prior to or within thecondensation chamber and downstream from the oven chamber therebyforming a joined path, wherein the joined path is configured to deliverthe inhalable aerosol through the aerosol outlet of the mouthpiece to auser.

A device for generating an inhalable aerosol may comprise: a device bodycomprising a cartridge receptacle; a cartridge comprising: a fluidstorage compartment, and a channel integral to an exterior surface ofthe cartridge, and an air inlet passage formed by the channel and aninternal surface of the cartridge receptacle when the cartridge isinserted into the cartridge receptacle; wherein the channel forms afirst side of the air inlet passage, and an internal surface of thecartridge receptacle forms a second side of the air inlet passage.

A device for generating an inhalable aerosol may comprise: a device bodycomprising a cartridge receptacle; a cartridge comprising: a fluidstorage compartment, and a channel integral to an exterior surface ofthe cartridge, and an air inlet passage formed by the channel and aninternal surface of the cartridge receptacle when the cartridge isinserted into the cartridge receptacle; wherein the channel forms afirst side of the air inlet passage, and an internal surface of thecartridge receptacle forms a second side of the air inlet passage.

The channel may comprise at least one of a groove, a trough, adepression, a dent, a furrow, a trench, a crease, and a gutter. Theintegral channel may comprise walls that are either recessed into thesurface or protrude from the surface where it is formed. The internalside walls of the channel may form additional sides of the air inletpassage. The cartridge may further comprise a second air passage influid communication with the air inlet passage to the fluid storagecompartment, wherein the second air passage is formed through thematerial of the cartridge. The cartridge may further comprise a heater.The heater may be attached to a first end of the cartridge.

The heater may comprise a heater chamber, a first pair of heatercontacts, a fluid wick, and a resistive heating element in contact withthe wick, wherein the first pair of heater contacts comprise thin platesaffixed about the sides of the heater chamber, and wherein the fluidwick and resistive heating element are suspended there between. Thefirst pair of heater contacts may further comprise a formed shape thatcomprises a tab having a flexible spring value that extends out of theheater to couple to complete a circuit with the device body. The firstpair of heater contacts may be a heat sink that absorbs and dissipatesexcessive heat produced by the resistive heating element. The first pairof heater contacts may contact a heat shield that protects the heaterchamber from excessive heat produced by the resistive heating element.The first pair of heater contacts may be press-fit to an attachmentfeature on the exterior wall of the first end of the cartridge. Theheater may enclose a first end of the cartridge and a first end of thefluid storage compartment. The heater may comprise a first condensationchamber. The heater may comprise more than one first condensationchamber. The first condensation chamber may be formed along an exteriorwall of the cartridge. The cartridge may further comprise a mouthpiece.The mouthpiece may be attached to a second end of the cartridge. Themouthpiece may comprise a second condensation chamber. The mouthpiecemay comprise more than one second condensation chamber. The secondcondensation chamber may be formed along an exterior wall of thecartridge.

The cartridge may comprise a first condensation chamber and a secondcondensation chamber. The first condensation chamber and the secondcondensation chamber may be in fluid communication. The mouthpiece maycomprise an aerosol outlet in fluid communication with the secondcondensation chamber. The mouthpiece may comprise more than one aerosoloutlet in fluid communication with more than one the second condensationchamber. The mouthpiece may enclose a second end of the cartridge and asecond end of the fluid storage compartment.

The device may comprise an airflow path comprising an air inlet passage,a second air passage, a heater chamber, a first condensation chamber, asecond condensation chamber, and an aerosol outlet. The airflow path maycomprise more than one air inlet passage, a heater chamber, more thanone first condensation chamber, more than one second condensationchamber, more than one second condensation chamber, and more than oneaerosol outlet. The heater may be in fluid communication with the fluidstorage compartment. The fluid storage compartment may be capable ofretaining condensed aerosol fluid. The condensed aerosol fluid maycomprise a nicotine formulation. The condensed aerosol fluid maycomprise a humectant. The humectant may comprise propylene glycol. Thehumectant may comprise vegetable glycerin.

The cartridge may be detachable. The cartridge may be receptacle and thedetachable cartridge forms a separable coupling. The separable couplingmay comprise a friction assembly, a snap-fit assembly or a magneticassembly. The cartridge may comprise a fluid storage compartment, aheater affixed to a first end with a snap-fit coupling, and a mouthpieceaffixed to a second end with a snap-fit coupling.

A device for generating an inhalable aerosol may comprise: a device bodycomprising a cartridge receptacle for receiving a cartridge; wherein aninterior surface of the cartridge receptacle forms a first side of anair inlet passage when a cartridge comprising a channel integral to anexterior surface is inserted into the cartridge receptacle, and whereinthe channel forms a second side of the air inlet passage.

A device for generating an inhalable aerosol may comprise: a device bodycomprising a cartridge receptacle for receiving a cartridge; wherein thecartridge receptacle comprises a channel integral to an interior surfaceand forms a first side of an air inlet passage when a cartridge isinserted into the cartridge receptacle, and wherein an exterior surfaceof the cartridge forms a second side of the air inlet passage.

A cartridge for a device for generating an inhalable aerosol mayinclude: a fluid storage compartment; a channel integral to an exteriorsurface, wherein the channel forms a first side of an air inlet passage;and wherein an internal surface of a cartridge receptacle in the deviceforms a second side of the air inlet passage when the cartridge isinserted into the cartridge receptacle.

A cartridge for a device for generating an inhalable aerosol maycomprise: a fluid storage compartment, wherein an exterior surface ofthe cartridge forms a first side of an air inlet channel when insertedinto a device body comprising a cartridge receptacle, and wherein thecartridge receptacle further comprises a channel integral to an interiorsurface, and wherein the channel forms a second side of the air inletpassage.

The cartridge may further comprise a second air passage in fluidcommunication with the channel, wherein the second air passage is formedthrough the material of the cartridge from an exterior surface of thecartridge to the fluid storage compartment.

The cartridge may comprise at least one of: a groove, a trough, adepression, a dent, a furrow, a trench, a crease, and a gutter. Theintegral channel may comprise walls that are either recessed into thesurface or protrude from the surface where it is formed. The internalside walls of the channel may form additional sides of the air inletpassage.

A device for generating an inhalable aerosol may comprise: a cartridgecomprising; a fluid storage compartment; a heater affixed to a first endcomprising; a first heater contact, a resistive heating element affixedto the first heater contact; a device body comprising; a cartridgereceptacle for receiving the cartridge; a second heater contact adaptedto receive the first heater contact and to complete a circuit; a powersource connected to the second heater contact; a printed circuit board(PCB) connected to the power source and the second heater contact;wherein the PCB is configured to detect the absence of fluid based onthe measured resistance of the resistive heating element, and turn offthe device.

The printed circuit board (PCB) may comprise a microcontroller;switches; circuitry comprising a reference resister; and an algorithmcomprising logic for control parameters; wherein the microcontrollercycles the switches at fixed intervals to measure the resistance of theresistive heating element relative to the reference resistor, andapplies the algorithm control parameters to control the temperature ofthe resistive heating element.

The micro-controller may instruct the device to turn itself off when theresistance exceeds the control parameter threshold indicating that theresistive heating element is dry.

A cartridge for a device for generating an inhalable aerosol maycomprise: a fluid storage compartment; a heater affixed to a first endcomprising: a heater chamber, a first pair of heater contacts, a fluidwick, and a resistive heating element in contact with the wick; whereinthe first pair of heater contacts comprise thin plates affixed about thesides of the heater chamber, and wherein the fluid wick and resistiveheating element are suspended there between.

The first pair of heater contacts may further comprise: a formed shapethat comprises a tab having a flexible spring value that extends out ofthe heater to complete a circuit with the device body. The heatercontacts may be configured to mate with a second pair of heater contactsin a cartridge receptacle of the device body to complete a circuit. Thefirst pair of heater contacts may also be a heat sink that absorbs anddissipates excessive heat produced by the resistive heating element. Thefirst pair of heater contacts may be a heat shield that protect theheater chamber from excessive heat produced by the resistive heatingelement.

A cartridge for a device for generating an inhalable aerosol maycomprise: a heater comprising; a heater chamber, a pair of thin plateheater contacts therein, a fluid wick positioned between the heatercontacts, and a resistive heating element in contact with the wick;wherein the heater contacts each comprise a fixation site wherein theresistive heating element is tensioned therebetween.

A cartridge for a device for generating an inhalable aerosol maycomprise a heater, wherein the heater is attached to a first end of thecartridge.

The heater may enclose a first end of the cartridge and a first end ofthe fluid storage compartment. The heater may comprise more than onefirst condensation chamber. The heater may comprise a first condensationchamber. The condensation chamber may be formed along an exterior wallof the cartridge.

A cartridge for a device for generating an inhalable aerosol maycomprise a fluid storage compartment; and a mouthpiece, wherein themouthpiece is attached to a second end of the cartridge.

The mouthpiece may enclose a second end of the cartridge and a secondend of the fluid storage compartment. The mouthpiece may comprise asecond condensation chamber. The mouthpiece may comprise more than onesecond condensation chamber. The second condensation chamber may beformed along an exterior wall of the cartridge.

A cartridge for a device for generating an inhalable aerosol maycomprise: a fluid storage compartment; a heater affixed to a first end;and a mouthpiece affixed to a second end; wherein the heater comprises afirst condensation chamber and the mouthpiece comprises a secondcondensation chamber.

The heater may comprise more than one first condensation chamber and themouthpiece comprises more than one second condensation chamber. Thefirst condensation chamber and the second condensation chamber may be influid communication. The mouthpiece may comprise an aerosol outlet influid communication with the second condensation chamber. The mouthpiecemay comprise two to more aerosol outlets. The cartridge may meet ISOrecycling standards. The cartridge may meet ISO recycling standards forplastic waste.

A device for generating an inhalable aerosol may comprise: a device bodycomprising a cartridge receptacle; and a detachable cartridge; whereinthe cartridge receptacle and the detachable cartridge form a separablecoupling, wherein the separable coupling comprises a friction assembly,a snap-fit assembly or a magnetic assembly.

A method of fabricating a device for generating an inhalable aerosol maycomprise: providing a device body comprising a cartridge receptacle; andproviding a detachable cartridge; wherein the cartridge receptacle andthe detachable cartridge form a separable coupling comprising a frictionassembly, a snap-fit assembly or a magnetic assembly.

A method of fabricating a cartridge for a device for generating aninhalable aerosol may comprise: providing a fluid storage compartment;affixing a heater to a first end with a snap-fit coupling; and affixinga mouthpiece to a second end with a snap-fit coupling.

A cartridge for a device for generating an inhalable aerosol with anairflow path may include: a channel comprising a portion of an air inletpassage; a second air passage in fluid communication with the channel; aheater chamber in fluid communication with the second air passage; afirst condensation chamber in fluid communication with the heaterchamber; a second condensation chamber in fluid communication with thefirst condensation chamber; and an aerosol outlet in fluid communicationwith second condensation chamber.

A cartridge for a device for generating an inhalable aerosol maycomprise: a fluid storage compartment; a heater affixed to a first end;and a mouthpiece affixed to a second end; wherein said mouthpiececomprises two or more aerosol outlets.

A system for providing power to an electronic device for generating aninhalable vapor may comprise; a rechargeable power storage device housedwithin the electronic device for generating an inhalable vapor; two ormore pins that are accessible from an exterior surface of the electronicdevice for generating an inhalable vapor, wherein the charging pins arein electrical communication with the rechargeable power storage device;a charging cradle comprising two or more charging contacts configured toprovided power to the rechargeable storage device, wherein the devicecharging pins are reversible such that the device is charged in thecharging cradle for charging with a first charging pin on the device incontact a first charging contact on the charging cradle and a secondcharging pin on the device in contact with second charging contact onthe charging cradle and with the first charging pin on the device incontact with second charging contact on the charging cradle and thesecond charging pin on the device in contact with the first chargingcontact on the charging cradle.

The charging pins may be visible on an exterior housing of the device.The user may permanently disable the device by opening the housing. Theuser may permanently destroy the device by opening the housing.

Additional aspects and advantages of the present disclosure will becomereadily apparent to those skilled in this art from the followingdetailed description, wherein only illustrative embodiments of thepresent disclosure are shown and described. As will be realized, thepresent disclosure is capable of other and different embodiments, andits several details are capable of modifications in various obviousrespects, all without departing from the disclosure. Accordingly, thedrawings and description are to be regarded as illustrative in nature,and not as restrictive.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an illustrative cross-sectional view of an exemplaryvaporization device.

FIG. 2 is an illustrative cross-sectional view of an exemplaryvaporization device with various electronic features and valves.

FIG. 3 is an illustrative sectional view of another exemplaryvaporization device comprising a condensation chamber, air inlet andaeration vent in the mouthpiece.

FIGS. 4A-4C is an illustrative example of an oven section of anotherexemplary vaporization device configuration with an access lid,comprising an oven having an air inlet, air outlet, and an additionalaeration vent in the airflow pathway, after the oven.

FIG. 5 is an illustrative isometric view of an assembled inhalableaerosol device.

FIGS. 6A-6D are illustrative arrangements and section views of thedevice body and sub-components.

FIG. 7A is an illustrative isometric view of an assembled cartridge.

FIG. 7B is an illustrative exploded isometric view of a cartridgeassembly

FIG. 7C is a side section view of FIG. 3A illustrating the inletchannel, inlet hole and relative placement of the wick, resistiveheating element, and heater contacts, and the heater chamber inside ofthe heater.

FIG. 8A is an illustrative end section view of an exemplary cartridgeinside the heater.

FIG. 8B is an illustrative side view of the cartridge with the capremoved and heater shown in shadow/outline.

FIGS. 9A-9L is an illustrative sequence of the assembly method for thecartridge.

FIGS. 10A-10C are illustrative sequences showing the airflow/vapor pathfor the cartridge.

FIGS. 11-13 represent an illustrative assembly sequence for assemblingthe main components of the device.

FIG. 14 illustrates front, side and section views of the assembledinhalable aerosol device.

FIG. 15 is an illustrative view of an activated, assembled inhalableaerosol device.

FIGS. 16A-16C are representative illustrations of a charging device forthe aerosol device and the application of the charger with the device.

FIGS. 17A and 17B are representative illustrations of aproportional-integral-derivative controller (PID) block diagram andcircuit diagram representing the essential components in a device tocontrol coil temperature.

FIG. 18 is a device with charging contacts visible from an exteriorhousing of the device.

FIG. 19 is an exploded view of a charging assembly of a device.

FIG. 20 is a detailed view of a charging assembly of a device.

FIG. 21 is a detailed view of charging pins in a charging assembly of adevice.

FIG. 22 is a device in a charging cradle.

FIG. 23 is a circuit provided on a PCB configured to permit a device tocomprise reversible charging contacts.

FIGS. 24A-24D illustrate schematics for one variation of a pressuresensor that may be used with any of the apparatuses described herein.FIGS. 24A-24C show dimensional drawings of the bottom, side and top,respectively, while FIG. 24D shows a section through the structure. Insome variations pins may replace the solder pads labeled “gate” and“ground” in FIG. 24C.

FIG. 25 is a sectional view of a schematic illustration through onevariation of a vaporizer device as described herein, showing an air paththrough the device.

FIG. 26 is a graph illustrating draw detection using an apparatus asdescribed herein, illustrating tracking of multiple draws.

FIG. 27 is a graph illustrating blow detection (and rejection) and drawdetection using an apparatus as described herein.

DETAILED DESCRIPTION

Provided herein are systems and methods for generating a vapor from amaterial. The vapor may be delivered for inhalation by a user: Thematerial may be a solid, liquid, powder, solution, paste, gel, or any amaterial with any other physical consistency. The vapor may be deliveredto the user for inhalation by a vaporization device. The vaporizationdevice may be a handheld vaporization device. The vaporization devicemay be held in one hand by the user.

The vaporization device may comprise one or more heating elements theheating element may be a resistive heating element. The heating elementmay heat the material such that the temperature of the materialincreases. Vapor may be generated as a result of heating the material.Energy may be required to operate the heating element, the energy may bederived from a battery in electrical communication with the heatingelement. Alternatively a chemical reaction (e.g., combustion or otherexothermic reaction) may provide energy to the heating element.

One or more aspects of the vaporization device may be designed and/orcontrolled in order to deliver a vapor with one or more specifiedproperties to the user. For example, aspects of the vaporization devicethat may be designed and/or controlled to deliver the vapor withspecified properties may comprise the heating temperature, heatingmechanism, device air inlets, internal volume of the device, and/orcomposition of the material.

In some cases, a vaporization device may have an “atomizer” or“cartomizer” configured to heat an aerosol forming solution (e.g.,vaporizable material). The aerosol forming solution may compriseglycerin and/or propylene glycol. The vaporizable material may be heatedto a sufficient temperature such that it may vaporize.

An atomizer may be a device or system configured to generate an aerosol.The atomizer may comprise a small heating element configured to heatand/or vaporize at least a portion of the vaporizable material and awicking material that may draw a liquid vaporizable material in to theatomizer. The wicking material may comprise silica fibers, cotton,ceramic, hemp, stainless steel mesh, and/or rope cables. The wickingmaterial may be configured to draw the liquid vaporizable material in tothe atomizer without a pump or other mechanical moving part. Aresistance wire may be wrapped around the wicking material and thenconnected to a positive and negative pole of a current source (e.g.,energy source). The resistance wire may be a coil. When the resistancewire is activated the resistance wire (or coil) may have a temperatureincrease as a result of the current flowing through the resistive wireto generate heat. The heat may be transferred to at least a portion ofthe vaporizable material through conductive, convective, and/orradiative heat transfer such that at least a portion of the vaporizablematerial vaporizes.

Alternatively or in addition to the atomizer, the vaporization devicemay comprise a “cartomizer” to generate an aerosol from the vaporizablematerial for inhalation by the user. The cartomizer may comprise acartridge and an atomizer. The cartomizer may comprise a heating elementsurrounded by a liquid-soaked poly-foam that acts as holder for thevaporiable material (e.g., the liquid). The cartomizer may be reusable,rebuildable, refillable, and/or disposable. The cartomizer may be usedwith a tank for extra storage of a vaporizable material.

Air may be drawn into the vaporization device to carry the vaporizedaerosol away from the heating element, where it then cools and condensesto form liquid particles suspended in air, which may then be drawn outof the mouthpiece by the user.

The vaporization of at least a portion of the vaporizable material mayoccur at lower temperatures in the vaporization device compared totemperatures required to generate an inhalable vapor in a cigarette. Acigarette may be a device in which a smokable material is burned togenerate an inhalable vapor. The lower temperature of the vaporizationdevice may result in less decomposition and/or reaction of the vaporizedmaterial, and therefore produce an aerosol with many fewer chemicalcomponents compared to a cigarette. In some cases, the vaporizationdevice may generate an aerosol with fewer chemical components that maybe harmful to human health compared to a cigarette. Additionally, thevaporization device aerosol particles may undergo nearly completeevaporation in the heating process, the nearly complete evaporation mayyield an average particle size (e.g., diameter) value that may besmaller than the average particle size in tobacco or botanical basedeffluent.

A vaporization device may be a device configured to extract forinhalation one or more active ingredients of plant material, tobacco,and/or a botanical, or other herbs or blends. A vaporization device maybe used with pure chemicals and/or humectants that may or may not bemixed with plant material. Vaporization may be alternative to burning(smoking) that may avoid the inhalation of many irritating and/or toxiccarcinogenic by-products which may result from the pyrolytic process ofburning tobacco or botanical products above 300° C. The vaporizationdevice may operate at a temperature at or below 300° C.

A vaporizer (e.g., vaporization device) may not have an atomizer orcartomizer. Instead the device may comprise an oven. The oven may be atleast partially closed. The oven may have a closable opening. The ovenmay be wrapped with a heating element, alternatively the heating elementmay be in thermal communication with the oven through another mechanism.A vaporizable material may be placed directly in the oven or in acartridge fitted in the oven. The heating element in thermalcommunication with the oven may heat a vaporizable material mass inorder to create a gas phase vapor. The heating element may heat thevaporizable material through conductive, convective, and/or radiativeheat transfer. The vapor may be released to a vaporization chamber wherethe gas phase vapor may condense, forming an aerosol cloud havingtypical liquid vapor particles with particles having a diameter ofaverage mass of approximately 1 micron or greater. In some cases thediameter of average mass may be approximately 0.1-1 micron.

A used herein, the term “vapor” may generally refer to a substance inthe gas phase at a temperature lower than its critical point. The vapormay be condensed to a liquid or to a solid by increasing its pressurewithout reducing the temperature.

As used herein, the term “aerosol” may generally refer to a colloid offine solid particles or liquid droplets in air or another gas. Examplesof aerosols may include clouds, haze, and smoke, including the smokefrom tobacco or botanical products. The liquid or solid particles in anaerosol may have varying diameters of average mass that may range frommonodisperse aerosols, producible in the laboratory, and containingparticles of uniform size; to polydisperse colloidal systems, exhibitinga range of particle sizes. As the sizes of these particles becomelarger, they have a greater settling speed which causes them to settleout of the aerosol faster, making the appearance of the aerosol lessdense and to shorten the time in which the aerosol will linger in air.Interestingly, an aerosol with smaller particles will appear thicker ordenser because it has more particles. Particle number has a much biggerimpact on light scattering than particle size (at least for theconsidered ranges of particle size), thus allowing for a vapor cloudwith many more smaller particles to appear denser than a cloud havingfewer, but larger particle sizes.

As used herein the term “humectant” may generally refer to as asubstance that is used to keep things moist. A humectant may attract andretain moisture in the air by absorption, allowing the water to be usedby other substances. Humectants are also commonly used in many tobaccosor botanicals and electronic vaporization products to keep productsmoist and as vapor-forming medium. Examples include propylene glycol,sugar polyols such as glycerol, glycerin, and honey.

Rapid Aeration

In some cases, the vaporization device may be configured to deliver anaerosol with a high particle density. The particle density of theaerosol may refer to the number of the aerosol droplets relative to thevolume of air (or other dry gas) between the aerosol droplets. A denseaerosol may easily be visible to a user. In some cases the user mayinhale the aerosol and at least a fraction of the aerosol particles mayimpinge on the lungs and/or mouth of the user. The user may exhaleresidual aerosol after inhaling the aerosol. When the aerosol is densethe residual aerosol may have sufficient particle density such that theexhaled aerosol is visible to the user. In some cases, a user may preferthe visual effect and/or mouth feel of a dense aerosol.

A vaporization device may comprise a vaporizable material. Thevaporizable material may be contained in a cartridge or the vaporizablematerial may be loosely placed in one or more cavities the vaporizationdevice. A heating element may be provided in the device to elevate thetemperature of the vaporizable material such that at least a portion ofthe vaporizable material forms a vapor. The heating element may heat thevaporizable material by convective heat transfer, conductive heattransfer, and/or radiative heat transfer. The heating element may heatthe cartridge and/or the cavity in which the vaporizable material isstored.

Vapor formed upon heating the vaporizable material may be delivered tothe user. The vapor may be transported through the device from a firstposition in the device to a second position in the device. In somecases, the first position may be a location where at least a portion ofthe vapor was generated, for example, the cartridge or cavity or an areaadjacent to the cartridge or cavity. The second position may be amouthpiece. The user may suck on the mouthpiece to inhale the vapor.

At least a fraction of the vapor may condense after the vapor isgenerated and before the vapor is inhaled by the user. The vapor maycondense in a condensation chamber. The condensation chamber may be aportion of the device that the vapor passes through before delivery tothe user. In some cases, the device may include at least one aerationvent, placed in the condensation chamber of the vaporization device. Theaeration vent may be configured to introduce ambient air (or other gas)into the vaporization chamber. The air introduced into the vaporizationchamber may have a temperature lower than the temperature of a gasand/or gas/vapor mixture in the condensation chamber. Introduction ofthe relatively lower temperature gas into the vaporization chamber mayprovide rapid cooling of the heated gas vapor mixture that was generatedby heating the vaporizable material. Rapid cooling of the gas vapormixture may generate a dense aerosol comprising a high concentration ofliquid droplets having a smaller diameter and/or smaller average masscompared to an aerosol that is not rapidly cooled prior to inhalation bythe user.

An aerosol with a high concentration of liquid droplets having a smallerdiameter and/or smaller average mass compared to an aerosol that is notrapidly cooled prior to inhalation by the user may be formed in atwo-step process. The first step may occur in the oven chamber where thevaporizable material (e.g., tobacco and/or botanical and humectantblend) may be heated to an elevated temperature. At the elevatedtemperature, evaporation may happen faster than at room temperature andthe oven chamber may fill with the vapor phase of the humectants. Thehumectant may continue to evaporate until the partial pressure of thehumectant is equal to the saturation pressure. At this point, the gas issaid to have a saturation ratio of 1 (S=Ppartial/Psat).

In the second step, the gas (e.g., vapor and air) may exit the oven andenter a condenser or condensation chamber and begin to cool. As the gasphase vapor cools, the saturation pressure may decrease. As thesaturation pressure decreases, the saturation ratio may increase and thevapor may begin to condense, forming droplets. In some devices, with theabsence of added cooling aeration, the cooling may be relatively slowersuch that high saturation pressures may not be reached, and the dropletsthat form in the devices without added cooling aeration may berelatively larger and fewer in numbers. When cooler air is introduced, atemperature gradient may be formed between the cooler air and therelatively warmer gas in the device. Mixing between the cooler air andthe relatively warmer gas in a confined space inside of the vaporizationdevice may lead to rapid cooling. The rapid cooling may generate highsaturation ratios, small particles, and high concentrations of smallerparticles, forming a thicker, denser vapor cloud compared to particlesgenerated in a device without the aeration vents.

For the purpose of this disclosure, when referring to ratios ofhumectants such as vegetable glycerol or propylene glycol, “about” meansa variation of 5%, 10%, 20% or 25% depending on the embodiment.

For the purpose of this disclosure, when referring to a diameter ofaverage mass in particle sizes, “about” means a variation of 5%, 10%,20% or 25% depending on the embodiment.

A vaporization device configured to rapidly cool a vapor may comprise: amouthpiece comprising an aerosol outlet at a first end of the device; anoven comprising an oven chamber and a heater for heating a vapor formingmedium in the oven chamber and for forming a vapor therein; a condensercomprising a condensation chamber in which the vapor forms the inhalableaerosol; an air inlet that originates a first airflow path that includesthe oven chamber and then the condensation chamber, an aeration ventthat originates a second airflow path that joins the first airflow pathprior to or within the condensation chamber after the vapor is formed inthe oven chamber, wherein the joined first airflow path and secondairflow path are configured to deliver the inhalable aerosol formed inthe condensation chamber through the aerosol outlet of the mouthpiece toa user.

In some embodiments, the oven is within a body of the device. The ovenchamber may comprise an oven chamber inlet and an oven chamber outlet.The oven may further comprise a first valve at the oven chamber inlet,and a second valve at the oven chamber outlet.

The oven may be contained within a device housing. In some cases thebody of the device may comprise the aeration vent and/or the condenser.The body of the device may comprise one or more air inlets. The body ofthe device may comprise a housing that holds and/or at least partiallycontains one or more elements of the device.

The mouthpiece may be connected to the body. The mouthpiece may beconnected to the oven. The mouthpiece may be connected to a housing thatat least partially encloses the oven. In some cases, the mouthpiece maybe separable from the oven, the body, and/or the housing that at leastpartially encloses the oven. The mouthpiece may comprise at least one ofthe air inlet, the aeration vent, and the condenser. The mouthpiece maybe integral to the body of the device. The body of the device maycomprise the oven.

In some cases, the one or more aeration vents may comprise a valve. Thevalve may regulate a flow rate of air entering the device through theaeration vent. The valve may be controlled through a mechanical and/orelectrical control system.

A vaporization device configured to rapidly cool a vapor may comprise: abody, a mouthpiece, an aerosol outlet, a condenser with a condensationchamber, a heater, an oven with an oven chamber, a primary airflowinlet, and at least one aeration vent provided in the body, downstreamof the oven, and upstream of the mouthpiece.

FIG. 1 shows an example of a vaporization device configured to rapidlycool a vapor. The device 100, may comprise a body 101. The body mayhouse and/or integrate with one or more components of the device. Thebody may house and/or integrate with a mouthpiece 102. The mouthpiece102 may have an aerosol outlet 122. A user may inhale the generatedaerosol through the aerosol outlet 122 on the mouthpiece 102. The bodymay house and/or integrate with an oven region 104. The oven region 104may comprise an oven chamber where vapor forming medium 106 may beplaced. The vapor forming medium may include tobacco and/or botanicals,with or without a secondary humectant. In some cases the vapor formingmedium may be contained in a removable and/or refillable cartridge.

Air may be drawn into the device through a primary air inlet 121. Theprimary air inlet 121 may be on an end of the device 100 opposite themouthpiece 102. Alternatively, the primary air inlet 121 may be adjacentto the mouthpiece 102. In some cases, a pressure drop sufficient to pullair into the device through the primary air inlet 121 may be due to auser puffing on the mouthpiece 102.

The vapor forming medium (e.g., vaporizable material) may be heated inthe oven chamber by a heater 105, to generate elevated temperature gasphases (vapor) of the tobacco or botanical and humectant/vapor formingcomponents. The heater 105 may transfer heat to the vapor forming mediumthrough conductive, convective, and/or radiative heat transfer. Thegenerated vapor may be drawn out of the oven region and into thecondensation chamber 103 a, of the condenser 103 where the vapors maybegin to cool and condense into micro-particles or droplets suspended inair, thus creating the initial formation of an aerosol, before beingdrawn out of the mouthpiece through the aerosol outlet 122.

In some cases, relatively cooler air may be introduced into thecondensation chamber 103 a, through an aeration vent 107 such that thevapor condenses more rapidly compared to a vapor in a device without theaeration vent 107. Rapidly cooling the vapor may create a denser aerosolcloud having particles with a diameter of average mass of less than orequal to about 1 micron, and depending on the mixture ratio of thevapor-forming humectant, particles with a diameter of average mass ofless than or equal to about 0.5 micron

Also described herein are devices for generating an inhalable aerosolsaid device comprising a body with a mouthpiece at one end, an attachedbody at the other end comprising a condensation chamber, a heater, anoven, wherein the oven comprises a first valve in the airflow path atthe primary airflow inlet of the oven chamber, and a second valve at theoutlet end of the oven chamber, and at least one aeration vent providedin the body, downstream of the oven, and upstream of the mouthpiece.

FIG. 2 shows a diagram of an alternative embodiment of the vaporizationdevice 200. The vaporization device may have a body 201. The body 201may integrate with and/or contain one or more components of the device.The body may integrate with or be connected to a mouthpiece 202

The body may comprise an oven region 204, with an oven chamber 204 ahaving a first constricting valve 208 in the primary air inlet of theoven chamber and a second constricting valve 209 at the oven chamberoutlet. The oven chamber 204 a may be sealed with a tobacco or botanicaland/or humectant/vapor forming medium 206 therein. The seal may be anair tight and/or liquid tight seal. The heater may be provided to theoven chamber with a heater 205. The heater 205 may be in thermalcommunication with the oven, for example the heater may be surroundingthe oven chamber during the vaporization process. Heater may contact theoven. The heater may be wrapped around the oven. Before inhalation andbefore air is drawn in through a primary air inlet 221, pressure maybuild in the sealed oven chamber as heat is continually added. Thepressure may build due to a phase change of the vaporizable material.Elevated temperature gas phases (vapor) of the tobacco or botanical andhumectant/vapor forming components may be achieved by continually addingheat to the oven. This heated pressurization process may generate evenhigher saturation ratios when the valves 208, 209 are opened duringinhalation. The higher saturation ratios may cause relatively higherparticle concentrations of gas phase humectant in the resultant aerosol.When the vapor is drawn out of the oven region and into the condensationchamber 203 a of the condenser 203, for example by inhalation by theuser, the gas phase humectant vapors may be exposed to additional airthrough an aeration vent 207, and the vapors may begin to cool andcondense into droplets suspended in air. As described previously theaerosol may be drawn through the mouthpiece 222 by the user. Thiscondensation process may be further refined by adding an additionalvalve 210, to the aeration vent 207 to further control the air-vapormixture process.

FIG. 2 also illustrates an exemplary embodiment of the additionalcomponents which would be found in a vaporizing device, including apower source or battery 211, a printed circuit board 212, a temperatureregulator 213, and operational switches (not shown), housed within aninternal electronics housing 214, to isolate them from the damagingeffects of the moisture in the vapor and/or aerosol. The additionalcomponents may be found in a vaporizing device that may or may notcomprise an aeration vent as described above.

In some embodiments of the vaporization device, components of the deviceare user serviceable, such as the power source or battery. Thesecomponents may be replaceable or rechargeable.

Also described herein are devices for generating an inhalable aerosolsaid device comprising a first body, a mouthpiece having an aerosoloutlet, a condensation chamber within a condenser and an airflow inletand channel, an attached second body, comprising a heater and oven withan oven chamber, wherein said airflow channel is upstream of the ovenand the mouthpiece outlet to provide airflow through the device, acrossthe oven, and into the condensation chamber where an auxiliary aerationvent is provided.

FIG. 3 shows a section view of a vaporization device 300. The device 300may comprise a body 301. The body may be connected to or integral with amouthpiece 302 at one end. The mouthpiece may comprise a condensationchamber 303 a within a condenser section 303 and an airflow inlet 321and air channel 323. The device body may comprise a proximally locatedoven 304 comprising an oven chamber 304 a. The oven chamber may be inthe body of the device. A vapor forming medium 306 (e.g., vaporizablematerial) comprising tobacco or botanical and humectant vapor formingmedium may be placed in the oven. The vapor forming medium may be indirect contact with an air channel 323 from the mouthpiece. The tobaccoor botanical may be heated by heater 305 surrounding the oven chamber,to generate elevated temperature gas phases (vapor) of the tobacco orbotanical and humectant/vapor forming components and air drawn inthrough a primary air inlet 321, across the oven, and into thecondensation chamber 303 a of the condenser region 303 due to a userpuffing on the mouthpiece. Once in the condensation chamber where thegas phase humectant vapors begin to cool and condense into dropletssuspended in air, additional air is allowed to enter through aerationvent 307, thus, once again creating a denser aerosol cloud havingparticles with a diameter of average mass of less than a typicalvaporization device without an added aeration vent, before being drawnout of the mouthpiece through the aerosol outlet 322.

The device may comprises a mouthpiece comprising an aerosol outlet at afirst end of the device and an air inlet that originates a first airflowpath; an oven comprising an oven chamber that is in the first airflowpath and includes the oven chamber and a heater for heating a vaporforming medium in the oven chamber and for forming a vapor therein, acondenser comprising a condensation chamber in which the vapor forms theinhalable aerosol, an aeration vent that originates a second airflowpath that allows air from the aeration vent to join the first airflowpath prior to or within the condensation chamber and downstream from theoven chamber thereby forming a joined path, wherein the joined path isconfigured to deliver the inhalable aerosol formed in the condensationchamber through the aerosol outlet of the mouthpiece to a user.

The device may comprise a mouthpiece comprising an aerosol outlet at afirst end of the device, an air inlet that originates a first airflowpath, and an aeration vent that originates a second airflow path thatallows air from the aeration vent to join the first airflow path; anoven comprising an oven chamber that is in the first airflow path andincludes the oven chamber and a heater for heating a vapor formingmedium in the oven chamber and for forming a vapor therein, a condensercomprising a condensation chamber in which the vapor forms the inhalableaerosol and wherein air from the aeration vent joins the first airflowpath prior to or within the condensation chamber and downstream from theoven chamber thereby forming a joined path, wherein the joined path isconfigured to deliver the inhalable aerosol through the aerosol outletof the mouthpiece to a user, as illustrated in exemplary FIG. 3.

The device may comprise a body with one or more separable components.For example, the mouthpiece may be separably attached to the bodycomprising the condensation chamber, a heater, and an oven, asillustrated in exemplary FIG. 1 or 2.

The device may comprise a body with one or more separable components.For example, the mouthpiece may be separably attached to the body. Themouthpiece may comprise the condensation chamber, and may be attached toor immediately adjacent to the oven and which is separable from the bodycomprising a heater, and the oven, as illustrated in exemplary FIG. 3.

The at least one aeration vent may be located in the condensationchamber of the condenser, as illustrated in exemplary FIG. 1, 2, or 3.The at least one aeration vent may comprise a third valve in the airflowpath of the at least one aeration vent, as illustrated in exemplary FIG.2. The first, second and third valve is a check valve, a clack valve, anon-return valve, or a one-way valve. In any of the precedingvariations, the first, second or third valve may be mechanicallyactuated, electronically actuated or manually actuated. One skilled inthe art will recognize after reading this disclosure that this devicemay be modified in a way such that any one, or each of these openings orvents could be configured to have a different combination or variationof mechanisms as described to control airflow, pressure and temperatureof the vapor created and aerosol being generated by these deviceconfigurations, including a manually operated opening or vent with orwithout a valve.

The device may further comprise at least one of: a power source, aprinted circuit board, a switch, and a temperature regulator.Alternately, one skilled in the art would recognize that eachconfiguration previously described will also accommodate said powersource (battery), switch, printed circuit board, or temperatureregulator as appropriate, in the body.

The device may be disposable when the supply of pre-packagedaerosol-forming media is exhausted. Alternatively, the device may berechargeable such that the battery may be rechargeable or replaceable,and/or the aerosol-forming media may be refilled, by the user/operatorof the device. Still further, the device may be rechargeable such thatthe battery may be rechargeable or replaceable, and/or the operator mayalso add or refill a tobacco or botanical component, in addition to arefillable or replaceable aerosol-forming media to the device.

As illustrated in FIG. 1, 2 or 3, the vaporization device may comprisetobacco or a botanical heated in said oven chamber, wherein said tobaccoor botanical further comprises humectants to produce an aerosolcomprising gas phase components of the humectant and tobacco orbotanical. The gas phase humectant and tobacco or botanical vaporproduced by said heated aerosol forming media 106, 206, 306 may furtherbe mixed with air from a special aeration vent 107, 207, 307 afterexiting the oven area 104, 204, 304 and entering a condensation chamber103 a, 203 a, 303 a to cool and condense said gas phase vapors toproduce a far denser, thicker aerosol comprising more particles thanwould have otherwise been produced without the extra cooling air, with adiameter of average mass of less than or equal to about 1 micron.

Each aerosol configuration produced by mixing the gas phase vapors withthe cool air may comprise a different range of particles, for example;with a diameter of average mass of less than or equal to about 0.9micron; less than or equal to about 0.8 micron; less than or equal toabout 0.7 micron; less than or equal to about 0.6 micron; and even anaerosol comprising particle diameters of average mass of less than orequal to about 0.5 micron.

The possible variations and ranges of aerosol density are great in thatthe possible number of combinations of temperature, pressure, tobacco orbotanical choices and humectant selections are numerous. However, byexcluding the tobacco or botanical choices and limiting the temperaturesranges and the humectant ratios to those described herein, the inventorhas demonstrated that this device will produce a far denser, thickeraerosol comprising more particles than would have otherwise beenproduced without the extra cooling air, with a diameter of average massof less than or equal to about 1 micron.

The humectant may comprise glycerol or vegetable glycerol as avapor-forming medium.

The humectant may comprise propylene glycol as a vapor-forming medium.

In preferred embodiments, the humectant may comprise a ratio ofvegetable glycerol to propylene glycol as a vapor-forming medium. Theranges of said ratio may vary between a ratio of about 100:0 vegetableglycerol to propylene glycol and a ratio of about 50:50 vegetableglycerol to propylene glycol. The difference in preferred ratios withinthe above stated range may vary by as little as 1, for example, saidratio may be about 99:1 vegetable glycerol to propylene glycol. However,more commonly said ratios would vary in increments of about 5, forexample, about 95:5 vegetable glycerol to propylene glycol; or about85:15 vegetable glycerol to propylene glycol; or about 55:45 vegetableglycerol to propylene glycol.

In a preferred embodiment the ratio for the vapor forming medium will bebetween the ratios of about 80:20 vegetable glycerol to propyleneglycol, and about 60:40 vegetable glycerol to propylene glycol.

In a most preferred embodiment, the ratio for the vapor forming mediumwill be about 70:30 vegetable glycerol to propylene glycol.

In any of the preferred embodiments, the humectant may further compriseflavoring products. These flavorings may include enhancers comprisingcocoa solids, licorice, tobacco or botanical extracts, and varioussugars, to name but a few.

The tobacco or botanical may be heated in the oven up to its pyrolytictemperature, which as noted previously is most commonly measured in therange of 300-1000° C.

In preferred embodiments, the tobacco or botanical is heated to about300° C. at most. In other preferred embodiments, the tobacco orbotanical is heated to about 200° C. at most. In still other preferredembodiments, the tobacco or botanical is heated to about 160° C. atmost. It should be noted that in these lower temperature ranges (<300°C.), pyrolysis of tobacco or botanical does not typically occur, yetvapor formation of the tobacco or botanical components and flavoringproducts does occur. In addition, vapor formation of the components ofthe humectant, mixed at various ratios will also occur, resulting innearly complete vaporization, depending on the temperature, sincepropylene glycol has a boiling point of about 180°-190° C. and vegetableglycerin will boil at approximately 280°-290° C.

In still other preferred embodiments, the aerosol produced by saidheated tobacco or botanical and humectant is mixed with air providedthrough an aeration vent.

In still other preferred embodiments, the aerosol produced by saidheated tobacco or botanical and humectant mixed with air, is cooled to atemperature of about 50°-70° C. at most, and even as low as 35° C.before exiting the mouthpiece, depending on the air temperature beingmixed into the condensation chamber. In some embodiments, thetemperature is cooled to about 35°-55° C. at most, and may have afluctuating range of ±about 10° C. or more within the overall range ofabout 35°-70° C.

Also described herein are vaporization devices for generating aninhalable aerosol comprising a unique oven configuration, wherein saidoven comprises an access lid and an auxiliary aeration vent locatedwithin the airflow channel immediately downstream of the oven and beforethe aeration chamber. In this configuration, the user may directlyaccess the oven by removing the access lid, providing the user with theability to recharge the device with vaporization material.

In addition, having the added aeration vent in the airflow channelimmediately after the oven and ahead of the vaporization chamberprovides the user with added control over the amount of air entering theaeration chamber downstream and the cooling rate of the aerosol beforeit enters the aeration chamber.

As noted in FIGS. 4A-4C, the device 400 may comprise a body 401, havingan air inlet 421 allowing initial air for the heating process into theoven region 404. After heating the tobacco or botanical, and humectant(heater not shown), the gas phase humectant vapor generated may traveldown the airflow channel 423, passing the added aeration vent 407wherein the user may selectively increase airflow into the heated vapor.The user may selectively increase and/or decrease the airflow to theheated vapor by controlling a valve in communication with the aerationvent 407. In some cases, the device may not have an aeration vent.Airflow into the heated vapor through the aeration vent may decrease thevapor temperature before exiting the airflow channel at the outlet 422,and increase the condensation rate and vapor density by decreasing thediameter of the vapor particles within the aeration chamber (not shown),thus producing a thicker, denser vapor compared to the vapor generatedby a device without the aeration vent. The user may also access the ovenchamber 404 a to recharge or reload the device 400, through an accesslid 430 provided therein, making the device user serviceable. The accesslid may be provided on a device with or without an aeration vent.

Provided herein is a method for generating an inhalable aerosol, themethod comprising: providing an vaporization device, wherein said deviceproduces a vapor comprising particle diameters of average mass of about1 micron or less, wherein the vapor is formed by heating a vapor formingmedium in an oven chamber of the device to a first temperature below thepyrolytic temperature of the vapor forming medium, and cooling the vaporin a condensation chamber to a temperature below the first temperature,before exiting an aerosol outlet of said device.

In some embodiments the vapor may be cooled by mixing relatively coolerair with the vapor in the condensation chamber during the condensationphase, after leaving the oven, where condensation of the gas phasehumectants occurs more rapidly due to high saturation ratios beingachieved at the moment of aeration, producing a higher concentration ofsmaller particles, with fewer by-products, in a denser aerosol, thanwould normally occur in a standard vaporization or aerosol generatingdevice.

In some embodiments, formation of an inhalable aerosol is a two-stepprocess. The first step occurs in the oven where the tobacco orbotanical and humectant blend is heated to an elevated temperature. Atthe elevated temperature, evaporation happens faster than at roomtemperature and the oven chamber fills with the vapor phase of thehumectants. The humectant will continue to evaporate until the partialpressure of the humectant is equal to the saturation pressure. At thispoint, the gas is said to have a saturation ratio of 1(S=Ppartial/Psat).

In the second step, the gas leaves the oven chamber, passes to acondensation chamber in a condenser and begins to cool. As the gas phasevapor cools, the saturation pressure also goes down, causing thesaturation ratio to rise, and the vapor to condensate, forming droplets.When cooling air is introduced, the large temperature gradient betweenthe two fluids mixing in a confined space leads to very rapid cooling,causing high saturation ratios, small particles, and higherconcentrations of smaller particles, forming a thicker, denser vaporcloud.

Provided herein is a method for generating an inhalable aerosolcomprising: a vaporization device having a body with a mouthpiece at oneend, and an attached body at the other end comprising; a condenser witha condensation chamber, a heater, an oven with an oven chamber, and atleast one aeration vent provided in the body, downstream of the oven,and upstream of the mouthpiece, wherein tobacco or botanical comprisinga humectant is heated in said oven chamber to produce a vapor comprisinggas phase humectants.

As previously described, a vaporization device having an auxiliaryaeration vent located in the condensation chamber capable of supplyingcool air (relative to the heated gas components) to the gas phase vaporsand tobacco or botanical components exiting the oven region, may beutilized to provide a method for generating a far denser, thickeraerosol comprising more particles than would have otherwise beenproduced without the extra cooling air, with a diameter of average massof less than or equal to about 1 micron.

In another aspect, provided herein is a method for generating aninhalable aerosol comprising: a vaporization device, having a body witha mouthpiece at one end, and an attached body at the other endcomprising: a condenser with a condensation chamber, a heater, an ovenwith an oven chamber, wherein said oven chamber further comprises afirst valve in the airflow path at the inlet end of the oven chamber,and a second valve at the outlet end of the oven chamber; and at leastone aeration vent provided in said body, downstream of the oven, andupstream of the mouthpiece wherein tobacco or botanical comprising ahumectant is heated in said oven chamber to produce a vapor comprisinggas phase humectants.

As illustrated in exemplary FIG. 2, by sealing the oven chamber 204 awith a tobacco or botanical and humectant vapor forming medium 206therein, and applying heat with the heater 205 during the vaporizationprocess, before inhalation and air is drawn in through a primary airinlet 221, the pressure will build in the oven chamber as heat iscontinually added with an electronic heating circuit generated throughthe combination of the battery 211, printed circuit board 212,temperature regulator 213, and operator controlled switches (not shown),to generate even greater elevated temperature gas phase humectants(vapor) of the tobacco or botanical and humectant vapor formingcomponents. This heated pressurization process generates even highersaturation ratios when the valves 208, 209 are opened during inhalation,which cause higher particle concentrations in the resultant aerosol,when the vapor is drawn out of the oven region and into the condensationchamber 203 a, where they are again exposed to additional air through anaeration vent 207, and the vapors begin to cool and condense intodroplets suspended in air, as described previously before the aerosol iswithdrawn through the mouthpiece 222. The inventor also notes that thiscondensation process may be further refined by adding an additionalvalve 210, to the aeration vent 207 to further control the air-vapormixture process.

In some embodiments of any one of the inventive methods, the first,second and/or third valve is a one-way valve, a check valve, a clackvalve, or a non-return valve. The first, second and/or third valve maybe mechanically actuated. The first, second and/or third valve may beelectronically actuated. The first, second and/or third valve may beautomatically actuated. The first, second and/or third valve may bemanually actuated either directly by a user or indirectly in response toan input command from a user to a control system that actuates thefirst, second and/or third valve.

In other aspects of the inventive methods, said device further comprisesat least one of: a power source, a printed circuit board, or atemperature regulator.

In any of the preceding aspects of the inventive method, one skilled inthe art will recognize after reading this disclosure that this methodmay be modified in a way such that any one, or each of these openings orvents could be configured to have a different combination or variationof mechanisms or electronics as described to control airflow, pressureand temperature of the vapor created and aerosol being generated bythese device configurations, including a manually operated opening orvent with or without a valve.

The possible variations and ranges of aerosol density are great in thatthe possible number of temperature, pressure, tobacco or botanicalchoices and humectant selections and combinations are numerous. However,by excluding the tobacco or botanical choices and limiting thetemperatures to within the ranges and the humectant ratios describedherein, the inventor has demonstrated a method for generating a fardenser, thicker aerosol comprising more particles than would haveotherwise been produced without the extra cooling air, with a diameterof average mass of less than or equal to 1 micron.

In some embodiments of the inventive methods, the humectant comprises aratio of vegetable glycerol to propylene glycol as a vapor-formingmedium. The ranges of said ratio will vary between a ratio of about100:0 vegetable glycerol to propylene glycol and a ratio of about 50:50vegetable glycerol to propylene glycol. The difference in preferredratios within the above stated range may vary by as little as 1, forexample, said ratio may be about 99:1 vegetable glycerol to propyleneglycol. However, more commonly said ratios would vary in increments of5, for example, about 95:5 vegetable glycerol to propylene glycol; orabout 85:15 vegetable glycerol to propylene glycol; or about 55:45vegetable glycerol to propylene glycol.

Because vegetable glycerol is less volatile than propylene glycol, itwill recondense in greater proportions. A humectant with higherconcentrations of glycerol will generate a thicker aerosol. The additionof propylene glycol will lead to an aerosol with a reduced concentrationof condensed phase particles and an increased concentration of vaporphase effluent. This vapor phase effluent is often perceived as a tickleor harshness in the throat when the aerosol is inhaled. To someconsumers, varying degrees of this sensation may be desirable. The ratioof vegetable glycerol to propylene glycol may be manipulated to balanceaerosol thickness with the right amount of “throat tickle.”

In a preferred embodiment of the method, the ratio for the vapor formingmedium will be between the ratios of about 80:20 vegetable glycerol topropylene glycol, and about 60:40 vegetable glycerol to propyleneglycol.

In a most preferred embodiment of the method, the ratio for the vaporforming medium will be about 70:30 vegetable glycerol to propyleneglycol. On will envision that there will be blends with varying ratiosfor consumers with varying preferences.

In any of the preferred embodiments of the method, the humectant furthercomprises flavoring products. These flavorings include enhancers such ascocoa solids, licorice, tobacco or botanical extracts, and varioussugars, to name a few.

In some embodiments of the method, the tobacco or botanical is heated toits pyrolytic temperature.

In preferred embodiments of the method, the tobacco or botanical isheated to about 300° C. at most.

In other preferred embodiments of the method, the tobacco or botanicalis heated to about 200° C. at most. In still other embodiments of themethod, the tobacco or botanical is heated to about 160° C. at most.

As noted previously, at these lower temperatures, (<300° C.), pyrolysisof tobacco or botanical does not typically occur, yet vapor formation ofthe tobacco or botanical components and flavoring products does occur.As may be inferred from the data supplied by Baker et al., an aerosolproduced at these temperatures is also substantially free from Hoffmananalytes or at least 70% less Hoffman analytes than a common tobacco orbotanical cigarette and scores significantly better on the Ames testthan a substance generated by burning a common cigarette. In addition,vapor formation of the components of the humectant, mixed at variousratios will also occur, resulting in nearly complete vaporization,depending on the temperature, since propylene glycol has a boiling pointof about 180°-190° C. and vegetable glycerin will boil at approximately280°-290° C.

In any one of the preceding methods, said inhalable aerosol produced bytobacco or a botanical comprising a humectant and heated in said ovenproduces an aerosol comprising gas phase humectants is further mixedwith air provided through an aeration vent.

In any one of the preceding methods, said aerosol produced by saidheated tobacco or botanical and humectant mixed with air, is cooled to atemperature of about 50°-70° C., and even as low as 35° C., beforeexiting the mouthpiece. In some embodiments, the temperature is cooledto about 35°-55° C. at most, and may have a fluctuating range of ±about10° C. or more within the overall range of about 35°-70° C.

In some embodiments of the method, the vapor comprising gas phasehumectant may be mixed with air to produce an aerosol comprisingparticle diameters of average mass of less than or equal to about 1micron.

In other embodiments of the method, each aerosol configuration producedby mixing the gas phase vapors with the cool air may comprise adifferent range of particles, for example; with a diameter of averagemass of less than or equal to about 0.9 micron; less than or equal toabout 0.8 micron; less than or equal to about 0.7 micron; less than orequal to about 0.6 micron; and even an aerosol comprising particlediameters of average mass of less than or equal to about 0.5 micron.

Cartridge Design and Vapor Generation from Material in Cartridge

In some cases, a vaporization device may be configured to generate aninhalable aerosol. A device may be a self-contained vaporization device.The device may comprise an elongated body which functions to complementaspects of a separable and recyclable cartridge with air inlet channels,air passages, multiple condensation chambers, flexible heater contacts,and multiple aerosol outlets. Additionally, the cartridge may beconfigured for ease of manufacture and assembly.

Provided herein is a vaporization device for generating an inhalableaerosol. The device may comprise a device body, a separable cartridgeassembly further comprising a heater, at least one condensation chamber,and a mouthpiece. The device provides for compact assembly anddisassembly of components with detachable couplings; overheat shut-offprotection for the resistive heating element; an air inlet passage (anenclosed channel) formed by the assembly of the device body and aseparable cartridge; at least one condensation chamber within theseparable cartridge assembly; heater contacts; and one or morerefillable, reusable, and/or recyclable components.

Provided herein is a device for generating an inhalable aerosolcomprising: a device body comprising a cartridge receptacle; a cartridgecomprising: a storage compartment, and a channel integral to an exteriorsurface of the cartridge, and an air inlet passage formed by the channeland an internal surface of the cartridge receptacle when the cartridgeis inserted into the cartridge receptacle. The cartridge may be formedfrom a metal, plastic, ceramic, and/or composite material. The storagecompartment may hold a vaporizable material. FIG. 7A shows an example ofa cartridge 30 for use in the device. The vaporizable material may be aliquid at or near room temperature. In some cases the vaporizablematerial may be a liquid below room temperature. The channel may form afirst side of the air inlet passage, and an internal surface of thecartridge receptacle may form a second side of the air inlet passage, asillustrated in various non-limiting aspects of FIGS. 5-6D, 7C, 8A, 8B,and 10A

Provided herein is a device for generating an inhalable aerosol. Thedevice may comprise a body that houses, contains, and or integrates withone or more components of the device. The device body may comprise acartridge receptacle. The cartridge receptacle may comprise a channelintegral to an interior surface of the cartridge receptacle; and an airinlet passage formed by the channel and an external surface of thecartridge when the cartridge is inserted into the cartridge receptacle.A cartridge may be fitted and/or inserted into the cartridge receptacle.The cartridge may have a fluid storage compartment. The channel may forma first side of the air inlet passage, and an external surface of thecartridge forms a second side of the air inlet passage. The channel maycomprise at least one of: a groove; a trough; a track; a depression; adent; a furrow; a trench; a crease; and a gutter. The integral channelmay comprise walls that are either recessed into the surface or protrudefrom the surface where it is formed. The internal side walls of thechannel may form additional sides of the air inlet passage. The channelmay have a round, oval, square, rectangular, or other shaped crosssection. The channel may have a closed cross section. The channel may beabout 0.1 cm, 0.5 cm, 1 cm, 2 cm, or 5 cm wide. The channel may be about0.1 mm, 0.5 mm, 1 mm, 2 mm, or 5 mm deep. The channel may be about 0.1cm, 0.5 cm, 1 cm, 2 cm, or 5 cm long. There may be at least 1 channel.

In some embodiments, the cartridge may further comprise a second airpassage in fluid communication with the air inlet passage to the fluidstorage compartment, wherein the second air passage is formed throughthe material of the cartridge.

FIGS. 5-7C show various views of a compact electronic device assembly 10for generating an inhalable aerosol. The compact electronic device 10may comprise a device body 20 with a cartridge receptacle 21 forreceiving a cartridge 30. The device body may have a square orrectangular cross section. Alternatively, the cross section of the bodymay be any other regular or irregular shape. The cartridge receptaclemay be shaped to receive an opened cartridge 30 a or “pod”. Thecartridge may be opened when a protective cap is removed from a surfaceof the cartridge. In some cases, the cartridge may be opened when a holeor opening is formed on a surface of the cartridge. The pod 30 a may beinserted into an open end of the cartridge receptacle 21 so that anexposed first heater contact tips 33 a on the heater contacts 33 of thepod make contact with the second heater contacts 22 of the device body,thus forming the device assembly 10.

Referring to FIG. 14, it is apparent in the plan view that when the pod30 a is inserted into the notched body of the cartridge receptacle 21,the channel air inlet 50 is left exposed. The size of the channel airinlet 50 may be varied by altering the configuration of the notch in thecartridge receptacle 21.

The device body may further comprise a rechargeable battery, a printedcircuit board (PCB) 24 containing a microcontroller with the operatinglogic and software instructions for the device, a pressure switch 27 forsensing the user's puffing action to activate the heater circuit, anindicator light 26, charging contacts (not shown), and an optionalcharging magnet or magnetic contact (not shown). The cartridge mayfurther comprise a heater 36. The heater may be powered by therechargeable battery. The temperature of the heater may be controlled bythe microcontroller. The heater may be attached to a first end of thecartridge.

In some embodiments, the heater may comprise a heater chamber 37, afirst pair of heater contacts 33, 33′, a fluid wick 34, and a resistiveheating element 35 in contact with the wick. The first pair of heatercontacts may comprise thin plates affixed about the sides of the heaterchamber. The fluid wick and resistive heating element may be suspendedbetween the heater contacts.

In some embodiments, there may be two or more resistive heating elements35, 35′ and two or more wicks 34, 34′. In some of the embodiments, theheater contact 33 may comprise: a flat plate; a male contact; a femalereceptacle, or both; a flexible contact and/or copper alloy or anotherelectrically conductive material. The first pair of heater contacts mayfurther comprise a formed shape that may comprise a tab (e.g., flange)having a flexible spring value that extends out of the heater tocomplete a circuit with the device body. The first pair of heatercontact may be a heat sink that absorb and dissipate excessive heatproduced by the resistive heating element. Alternatively, the first pairof heater contacts may be a heat shield that protects the heater chamberfrom excessive heat produced by the resistive heating element. The firstpair of heater contacts may be press-fit to an attachment feature on theexterior wall of the first end of the cartridge. The heater may enclosea first end of the cartridge and a first end of the fluid storagecompartment.

As illustrated in the exploded assembly of FIG. 7B, a heater enclosuremay comprises two or more heater contacts 33, each comprising a flatplate which may be machined or stamped from a copper alloy or similarelectrically conductive material. The flexibility of the tip is providedby the cut-away clearance feature 33 b created below the male contactpoint tip 33 a which capitalizes on the inherent spring capacity of themetal sheet or plate material. Another advantage and improvement of thistype of contact is the reduced space requirement, simplifiedconstruction of a spring contact point (versus a pogo pin) and the easyof assembly. The heater may comprise a first condensation chamber. Theheater may comprise more one or more additional condensation chambers inaddition to the first condensation chamber. The first condensationchamber may be formed along an exterior wall of the cartridge.

In some cases, the cartridge (e.g., pod) is configured for ease ofmanufacturing and assembly. The cartridge may comprise an enclosure. Theenclosure may be a tank. The tank may comprise an interior fluid storagecompartment 32. The interior fluid storage compartment 32 which is openat one or both ends and comprises raised rails on the side edges 45 band 46 b. The cartridge may be formed from plastic, metal, composite,and/or a ceramic material. The cartridge may be rigid or flexible.

The tank may further comprise a set of first heater contact plates 33formed from copper alloy or another electrically conductive material,having a thin cut-out 33 b below the contact tips 33 a (to create aflexible tab) which are affixed to the sides of the first end of thetank and straddle the open-sided end 53 of the tank. The plates mayaffix to pins, or posts as shown in FIG. 7B or 5, or may be attached byother common means such as compression beneath the enclosure 36. A fluidwick 34 having a resistive heating element 35 wrapped around it, isplaced between the first heater contact plates 33, and attached thereto.A heater 36, comprising raised internal edges on the internal end (notshown), a thin mixing zone (not shown), and primary condensation channelcovers 45 a that slide over the rails 45 b on the sides of the tank onthe first half of the tank, creating a primary condensationchannel/chamber 45. In addition, a small male snap feature 39 b locatedat the end of the channel cover is configured fall into a female snapfeature 39 a, located mid-body on the side of the tank, creating asnap-fit assembly.

As will be further clarified below, the combination of the open-sidedend 53, the protruding tips 33 a of the contact plates 33, the fluidwick 34 having a resistive heating element 35, enclosed in the open endof the fluid storage tank, under the heater 36, with a thin mixing zonetherein, creates an efficient heater system. In addition, the primarycondensation channel covers 45 a which slide over the rails 45 b on thesides of the tank create an integrated, easily assembled, primarycondensation chamber 45, all within the heater at the first end of thecartridge 30 or pod 30 a.

In some embodiments of the device, as illustrated in FIGS. 9A-9L, theheater may encloses at least a first end of the cartridge. The enclosedfirst end of the cartridge may include the heater and the interior fluidstorage compartment. In some embodiments, the heater further comprisesat least one first condensation chamber 45.

FIGS. 9A-9L show diagramed steps that mat be performed to assemble acartomizer and/or mouthpiece. In A-B the fluid storage compartment 32 amay be oriented such that the heater inlet 53 faces upward. The heatercontacts 33 may be inserted into the fluid storage compartment. Flexibletabs 33 a may be inserted into the heater contacts 33. In a step D theresistive heating element 35 may be wound on to the wick 34. In step Ethe wick 34 and heater 35 may be placed on the fluid storagecompartment. One or more free ends of the heater may sit outside theheater contacts. The one or more free ends may be soldered in place,rested in a groove, or snapped into a fitted location. At least afraction of the one or more free ends may be in communication with theheater contacts 33. In a step F the heater enclosure 36 may be snappedin place. The heater enclosure 36 may be fitted on the fluid storagecompartment. Step G shows the heater enclosure 36 is in place on thefluid storage compartment. In step H the fluid storage compartment canbe flipped over. In step I the mouthpiece 31 can be fitted on the fluidstorage compartment. Step J shows the mouthpiece 31 in place on thefluid storage compartment. In step K an end 49 can be fitted on thefluid storage compartment opposite the mouthpiece. Step L shows a fullyassembled cartridge 30. FIG. 7B shows an exploded view of the assembledcartridge 30.

Depending on the size of the heater and/or heater chamber, the heatermay have more than one wick 34 and resistive heating element 35.

In some embodiments, the first pair of heater contacts 33 furthercomprises a formed shape that comprises a tab 33 a having a flexiblespring value that extends out of the heater. In some embodiments, thecartridge 30 comprises heater contacts 33 which are inserted into thecartridge receptacle 21 of the device body 20 wherein, the flexible tabs33 a insert into a second pair of heater contacts 22 to complete acircuit with the device body. The first pair of heater contacts 33 maybe a heat sink that absorbs and dissipates excessive heat produced bythe resistive heating element 35. The first pair of heater contacts 33may be a heat shield that protects the heater chamber from excessiveheat produced by the resistive heating element 35. The first pair ofheater contacts may be press-fit to an attachment feature on theexterior wall of the first end of the cartridge. The heater 36 mayenclose a first end of the cartridge and a first end of the fluidstorage compartment 32 a. The heater may comprise a first condensationchamber 45. The heater may comprise at least one additional condensationchamber 45, 45′, 45″, etc. The first condensation chamber may be formedalong an exterior wall of the cartridge.

In still other embodiments of the device, the cartridge may furthercomprise a mouthpiece 31, wherein the mouthpiece comprises at least oneaerosol outlet channel/secondary condensation chamber 46; and at leastone aerosol outlet 47. The mouthpiece may be attached to a second end ofthe cartridge. The second end of the cartridge with the mouthpiece maybe exposed when the cartridge is inserted in the device. The mouthpiecemay comprise more than one second condensation chamber 46, 46′, 46″,etc. The second condensation chamber is formed along an exterior wall ofthe cartridge.

The mouthpiece 31 may enclose the second end of the cartridge andinterior fluid storage compartment. The partially assembled (e.g.,mouthpiece removed) unit may be inverted and filled with a vaporizablefluid through the opposite, remaining (second) open end. Once filled, asnap-on mouthpiece 31 that also closes and seals the second end of thetank is inserted over the end. It also comprises raised internal edges(not shown), and aerosol outlet channel covers 46 a that may slide overthe rails 46 b located on the sides of the second half of the tank,creating aerosol outlet channels/secondary condensation chambers 46. Theaerosol outlet channels/secondary condensation chambers 46 slide overthe end of primary condensation chamber 45, at a transition area 57, tocreate a junction for the vapor leaving the primary chamber and proceedout through the aerosol outlets 47, at the end of the aerosol outletchannels 46 and user-end of the mouthpiece 31.

The cartridge may comprise a first condensation chamber and a secondcondensation chamber 45, 46. The cartridge may comprise more than onefirst condensation chamber and more than one second condensation chamber45, 46, 45′, 46′, etc.

In some embodiments of the device, a first condensation chamber 45 maybe formed along the outside of the cartridge fluid storage compartment31. In some embodiments of the device an aerosol outlet 47 exists at theend of aerosol outlet chamber 46. In some embodiments of the device, afirst and second condensation chamber 45, 46 may be formed along theoutside of one side of the cartridge fluid storage compartment 31. Insome embodiments the second condensation chamber may be an aerosoloutlet chamber. In some embodiments another pair of first and/or secondcondensation chambers 45′, 46′ is formed along the outside of thecartridge fluid storage compartment 31 on another side of the device. Insome embodiments another aerosol outlet 47′ will also exist at the endof the second pair of condensation chambers 45′, 46′.

In any one of the embodiments, the first condensation chamber and thesecond condensation chamber may be in fluid communication as illustratedin FIG. 10C.

In some embodiments, the mouthpiece may comprise an aerosol outlet 47 influid communication with the second condensation chamber 46. Themouthpiece may comprise more than one aerosol outlet 47, 47′ in fluidcommunication with more than one the second condensation chamber 46,46′. The mouthpiece may enclose a second end of the cartridge and asecond end of the fluid storage compartment.

In each of the embodiments described herein, the cartridge may comprisean airflow path comprising: an air inlet passage; a heater; at least afirst condensation chamber; an aerosol outlet chamber, and an outletport. In some of the embodiments described herein, the cartridgecomprises an airflow path comprising: an air inlet passage; a heater; afirst condensation chamber; a secondary condensation chamber; and anoutlet port.

In still other embodiments described herein the cartridge may comprisean airflow path comprising at least one air inlet passage; a heater; atleast one first condensation chamber; at least one secondarycondensation chamber; and at least one outlet port.

As illustrated in FIGS. 10A-10C, an airflow path is created when theuser draws on the mouthpiece 31 to create a suction (e.g., a puff),which essentially pulls air through the channel air inlet opening 50,through the air inlet passage 51, and into the heater chamber 37 throughthe second air passage (tank air inlet hole) 41 at the tank air inlet52, then into the heater inlet 53. At this point, the pressure sensorhas sensed the user's puff, and activated the circuit to the resistiveheating element 35, which in turn, begins to generate vapor from thevapor fluid (e-juice). As air enters the heater inlet 53, it begins tomix and circulate in a narrow chamber above and around the wick 34 andbetween the heater contacts 33, generating heat, and dense, concentratedvapor as it mixes in the flow path 54 created by the sealing structureobstacles 44. FIG. 8A shows a detailed view of the sealing structureobstacles 44. Ultimately the vapor may be drawn, out of the heater alongan air path 55 near the shoulder of the heater and into the primarycondensation chamber 45 where the vapor expands and begins to cool. Asthe expanding vapor moves along the airflow path, it makes a transitionfrom the primary condensation chamber 45 through a transition area 57,creating a junction for the vapor leaving the primary chamber, andentering the second vapor chamber 46, and proceeds out through theaerosol outlets 47, at the end of the mouthpiece 31 to the user.

As illustrated in FIGS. 10A-10C, the device may have a dual set of airinlet passages 50-53, dual first condensation chambers 55/45, dualsecond condensation chambers and aeration channels 57/46, and/or dualaerosol outlet vents 47.

Alternatively, the device may have an airflow path comprising: an airinlet passage 50, 51; a second air passage 41; a heater chamber 37; afirst condensation chamber 45; a second condensation chamber 46; and/oran aerosol outlet 47.

In some cases, the devise may have an airflow path comprising: more thanone air inlet passage; more than one second air passage; a heaterchamber; more than one first condensation chamber; more than one secondcondensation chamber; and more than one aerosol outlet as clearlyillustrated in FIGS. 10A-10C.

In any one of the embodiments described herein, the heater 36 may be influid communication with the internal fluid storage compartment 32 a.

In each of the embodiments described herein, the fluid storagecompartment 32 is in fluid communication with the heater chamber 37,wherein the fluid storage compartment is capable of retaining condensedaerosol fluid, as illustrated in FIGS. 10A, 10C and 14.

In some embodiments of the device, the condensed aerosol fluid maycomprise a nicotine formulation. In some embodiments, the condensedaerosol fluid may comprise a humectant. In some embodiments, thehumectant may comprise propylene glycol. In some embodiments, thehumectant may comprise vegetable glycerin.

In some cases, the cartridge may be detachable from the device body. Insome embodiments, the cartridge receptacle and the detachable cartridgemay form a separable coupling. In some embodiments the separablecoupling may comprise a friction assembly. As illustrated in FIGS.11-14, the device may have a press-fit (friction) assembly between thecartridge pod 30 a and the device receptacle. Additionally, adent/friction capture such as 43 may be utilized to capture the pod 30 ato the device receptacle or to hold a protective cap 38 on the pod, asfurther illustrated in FIG. 8B.

In other embodiments, the separable coupling may comprise a snap-fit orsnap-lock assembly. In still other embodiments the separable couplingmay comprise a magnetic assembly.

In any one of the embodiments described herein, the cartridge componentsmay comprise a snap-fit or snap-lock assembly, as illustrated in FIG. 5.In any one of the embodiments, the cartridge components may be reusable,refillable, and/or recyclable. The design of these cartridge componentslend themselves to the use of such recyclable plastic materials aspolypropylene, for the majority of components.

In some embodiments of the device 10, the cartridge 30 may comprise: afluid storage compartment 32; a heater 36 affixed to a first end with asnap-fit coupling 39 a, 39 b; and a mouthpiece 31 affixed to a secondend with a snap-fit coupling 39 c, 39 d (not shown—but similar to 39 aand 39 b). The heater 36 may be in fluid communication with the fluidstorage compartment 32. The fluid storage compartment may be capable ofretaining condensed aerosol fluid. The condensed aerosol fluid maycomprise a nicotine formulation. The condensed aerosol fluid maycomprise a humectant. The humectant may comprise propylene glycol and/orvegetable glycerin.

Provided herein is a device for generating an inhalable aerosolcomprising: a device body 20 comprising a cartridge receptacle 21 forreceiving a cartridge 30; wherein an interior surface of the cartridgereceptacle forms a first side of an air inlet passage 51 when acartridge comprising a channel integral 40 to an exterior surface isinserted into the cartridge receptacle 21, and wherein the channel formsa second side of the air inlet passage 51.

Provided herein is a device for generating an inhalable aerosolcomprising: a device body 20 comprising a cartridge receptacle 21 forreceiving a cartridge 30; wherein the cartridge receptacle comprises achannel integral to an interior surface and forms a first side of an airinlet passage when a cartridge is inserted into the cartridgereceptacle, and wherein an exterior surface of the cartridge forms asecond side of the air inlet passage 51.

Provided herein is a cartridge 30 for a device for generating aninhalable aerosol 10 comprising: a fluid storage compartment 32; achannel integral 40 to an exterior surface, wherein the channel forms afirst side of an air inlet passage 51; and wherein an internal surfaceof a cartridge receptacle 21 in the device forms a second side of theair inlet passage 51 when the cartridge is inserted into the cartridgereceptacle.

Provided herein is a cartridge 30 for a device for generating aninhalable aerosol 10 comprising a fluid storage compartment 32, whereinan exterior surface of the cartridge forms a first side of an air inletchannel 51 when inserted into a device body 10 comprising a cartridgereceptacle 21, and wherein the cartridge receptacle further comprises achannel integral to an interior surface, and wherein the channel forms asecond side of the air inlet passage 51.

In some embodiments, the cartridge further comprises a second airpassage 41 in fluid communication with the channel 40, wherein thesecond air passage 41 is formed through the material of the cartridge 32from an exterior surface of the cartridge to the internal fluid storagecompartment 32 a.

In some embodiments of the device body cartridge receptacle 21 or thecartridge 30, the integral channel 40 comprises at least one of: agroove; a trough; a depression; a dent; a furrow; a trench; a crease;and a gutter.

In some embodiments of the device body cartridge receptacle 21 or thecartridge 30, the integral channel 40 comprises walls that are eitherrecessed into the surface or protrude from the surface where it isformed.

In some embodiments of the device body cartridge receptacle 21 or thecartridge 30, the internal side walls of the channel 40 form additionalsides of the air inlet passage 51.

Provided herein is a device for generating an inhalable aerosolcomprising: a cartridge comprising; a fluid storage compartment; aheater affixed to a first end comprising; a first heater contact, aresistive heating element affixed to the first heater contact; a devicebody comprising; a cartridge receptacle for receiving the cartridge; asecond heater contact adapted to receive the first heater contact and tocomplete a circuit; a power source connected to the second heatercontact; a printed circuit board (PCB) connected to the power source andthe second heater contact; wherein the PCB is configured to detect theabsence of fluid based on the measured resistance of the resistiveheating element, and turn off the device.

Referring now to FIGS. 13, 14, and 15, in some embodiments, the devicebody further comprises at least one: second heater contact 22 (bestshown in FIG. 6C detail); a battery 23; a printed circuit board 24; apressure sensor 27; and an indicator light 26.

In some embodiments, the printed circuit board (PCB) further comprises:a microcontroller; switches; circuitry comprising a reference resister;and an algorithm comprising logic for control parameters; wherein themicrocontroller cycles the switches at fixed intervals to measure theresistance of the resistive heating element relative to the referenceresistor, and applies the algorithm control parameters to control thetemperature of the resistive heating element.

As illustrated in the basic block diagram of FIG. 17A, the deviceutilizes a proportional-integral-derivative controller or PID controllaw. A PID controller calculates an “error” value as the differencebetween a measured process variable and a desired SetPoint. When PIDcontrol is enabled, power to the coil is monitored to determine whetheror not acceptable vaporization is occurring. With a given airflow overthe coil, more power will be required to hold the coil at a giventemperature if the device is producing vapor (heat is removed from thecoil to form vapor). If power required to keep the coil at the settemperature drops below a threshold, the device indicates that it cannotcurrently produce vapor. Under normal operating conditions, thisindicates that there is not enough liquid in the wick for normalvaporization to occur.

In some embodiments, the micro-controller instructs the device to turnitself off when the resistance exceeds the control parameter thresholdindicating that the resistive heating element is dry.

In still other embodiments, the printed circuit board further compriseslogic capable of detecting the presence of condensed aerosol fluid inthe fluid storage compartment and is capable of turning off power to theheating contact(s) when the condensed aerosol fluid is not detected.When the microcontroller is running the PID temperature controlalgorithm 70, the difference between a set point and the coiltemperature (error) is used to control power to the coil so that thecoil quickly reaches the set point temperature, [between 200° C. and400° C.]. When the over-temperature algorithm is used, power is constantuntil the coil reaches an over-temperature threshold, [between 200° C.and 400° C.]; (FIG. 17 A applies: set point temperature isover-temperature threshold; constant power until error reaches 0).

The essential components of the device used to control the resistiveheating element coil temperature are further illustrated in the circuitdiagram of FIG. 17B. Wherein, BATT 23 is the battery; MCU 72 is themicrocontroller; Q1 (76) and Q2 (77) are P-channel MOSFETs (switches);R_COIL 74 is the resistance of the coil. R_REF 75 is a fixed referenceresistor used to measure R_COIL 74 through a voltage divider 73.

The battery powers the microcontroller. The microcontroller turns on Q2for 1 ms every 100 ms so that the voltage between R_REF and R_COIL (avoltage divider) may be measured by the MCU at V_MEAS. When Q2 is off,the control law controls Q1 with PWM (pulse width modulation) to powerthe coil (battery discharges through Q1 and R_COIL when Q1 is on).

In some embodiments of the device, the device body further comprises atleast one: second heater contact; a power switch; a pressure sensor; andan indicator light.

In some embodiments of the device body, the second heater contact 22 maycomprise: a female receptacle; or a male contact, or both, a flexiblecontact; or copper alloy or another electrically conductive material.

In some embodiments of the device body, the battery supplies power tothe second heater contact, pressure sensor, indicator light and theprinted circuit board. In some embodiments, the battery is rechargeable.In some embodiments, the indicator light 26 indicates the status of thedevice and/or the battery or both.

In some embodiments of the device, the first heater contact and thesecond heater contact complete a circuit that allows current to flowthrough the heating contacts when the device body and detachablecartridge are assembled, which may be controlled by an on/off switch.Alternatively, the device can be turned on an off by a puff sensor. Thepuff sensor may comprise a capacitive membrane. The capacitive membranemay be similar to a capacitive membrane used in a microphone.

In some embodiments of the device, there is also an auxiliary chargingunit for recharging the battery 23 in the device body. As illustrated inFIGS. 16A-16C, the charging unit 60, may comprise a USB device with aplug for a power source 63 and protective cap 64, with a cradle 61 forcapturing the device body 20 (with or without the cartridge installed).The cradle may further comprise either a magnet or a magnetic contact 62to securely hold the device body in place during charging. Asillustrated in FIG. 6B, the device body further comprises a matingcharging contact 28 and a magnet or magnetic contact 29 for theauxiliary charging unit. FIG. 16C is an illustrative example of thedevice 20 being charged in a power source 65 (laptop computer ortablet).

In some cases the microcontroller on the PCB may be configured tomonitor the temperature of the heater such that the vaporizable materialis heated to a prescribed temperature. The prescribed temperature may bean input provided by the user. A temperature sensor may be incommunication with the microcontroller to provide an input temperatureto the microcontroller for temperature regulation. A temperature sensormay be a thermistor, thermocouple, thermometer, or any other temperaturesensors. In some cases, the heating element may simultaneously performas both a heater and a temperature sensor. The heating element maydiffer from a thermistor by having a resistance with a relatively lowerdependence on temperature. The heating element may comprise a resistancetemperature detector.

The resistance of the heating element may be an input to themicrocontroller. In some cases, the resistance may be determined by themicrocontroller based on a measurement from a circuit with a resistorwith at least one known resistance, for example, a Wheatstone bridge.Alternatively, the resistance of the heating element may be measuredwith a resistive voltage divider in contact with the heating element anda resistor with a known and substantially constant resistance. Themeasurement of the resistance of the heating element may be amplified byan amplifier. The amplifier may be a standard op amp or instrumentationamplifier. The amplified signal may be substantially free of noise. Insome cases, a charge time for a voltage divider between the heatingelement and a capacitor may be determined to calculate the resistance ofthe heating element. In some cases, the microcontroller must deactivatethe heating element during resistance measurements. The resistance ofthe heating element may be directly proportional to the temperature ofthe heating element such that the temperature may be directly determinefrom the resistance measurement. Determining the temperature directlyfrom the heating element resistance measurement rather than from anadditional temperature sensor may generate a more accurate measurementbecause unknown contact thermal resistance between the temperaturesensor and the heating element is eliminated. Additionally, thetemperature measurement may be determined directly and therefore fasterand without a time lag associated with attaining equilibrium between theheating element and a temperature sensor in contact with the heatingelement.

Provided herein is a device for generating an inhalable aerosolcomprising: a cartridge comprising a first heater contact; a device bodycomprising; a cartridge receptacle for receiving the cartridge; a secondheater contact adapted to receive the first heater contact and tocomplete a circuit; a power source connected to the second heatercontact; a printed circuit board (PCB) connected to the power source andthe second heater contact; and a single button interface; wherein thePCB is configured with circuitry and an algorithm comprising logic for achild safety feature.

In some embodiments, the algorithm requires a code provided by the userto activate the device. In some embodiments; the code is entered by theuser with the single button interface. In still further embodiments thesingle button interface is the also the power switch.

Provided herein is a cartridge 30 for a device 10 for generating aninhalable aerosol comprising: a fluid storage compartment 32; a heater36 affixed to a first end comprising: a heater chamber 37, a first pairof heater contacts 33, a fluid wick 34, and a resistive heating element35 in contact with the wick; wherein the first pair of heater contacts33 comprise thin plates affixed about the sides of the heater chamber37, and wherein the fluid wick 34 and resistive heating element 35 aresuspended there between.

Depending on the size of the heater or heater chamber, the heater mayhave more than one wick 34, 34′ and resistive heating element 35, 35′.

In some embodiments, the first pair of heater contacts further comprisea formed shape that comprises a tab 33 a having a flexible spring valuethat extends out of the heater 36 to complete a circuit with the devicebody 20.

In some embodiments, the heater contacts 33 are configured to mate witha second pair of heater contacts 22 in a cartridge receptacle 21 of thedevice body 20 to complete a circuit.

In some embodiments, the first pair of heater contacts is also a heatsink that absorbs and dissipates excessive heat produced by theresistive heating element.

In some embodiments, the first pair of heater contacts is a heat shieldthat protects the heater chamber from excessive heat produced by theresistive heating element.

Provided herein is a cartridge 30 for a device for generating aninhalable aerosol 10 comprising: a heater 36 comprising; a heaterchamber 37, a pair of thin plate heater contacts 33 therein, a fluidwick 34 positioned between the heater contacts 33, and a resistiveheating element 35 in contact with the wick; wherein the heater contacts33 each comprise a fixation site 33 c wherein the resistive heatingelement 35 is tensioned there between.

As will be obvious to one skilled in the art after reviewing theassembly method illustrated in FIGS. 9A-9L, the heater contacts 33simply snap or rest on locator pins on either side of the air inlet 53on the first end of the cartridge interior fluid storage compartment,creating a spacious vaporization chamber containing the at least onewick 34 and at least one heating element 35.

Provided herein is a cartridge 30 for a device for generating aninhalable aerosol 10 comprising a heater 36 attached to a first end ofthe cartridge.

In some embodiments, the heater encloses a first end of the cartridgeand a first end of the fluid storage compartment 32, 32 a.

In some embodiments, the heater comprises a first condensation chamber45.

In some embodiments, the heater comprises more than one firstcondensation chamber 45, 45′.

In some embodiments, the condensation chamber is formed along anexterior wall of the cartridge 45 b.

As noted previously, and described in FIGS. 10A, 10B and 10C, theairflow path through the heater and heater chamber generates vaporwithin the heater circulating air path 54, which then exits through theheater exits 55 into a first (primary) condensation chamber 45, which isformed by components of the tank body comprising the primarycondensation channel/chamber rails 45 b, the primary condensationchannel cover 45 a, (the outer side wall of the heater enclosure).

Provided herein is a cartridge 30 for a device for generating aninhalable aerosol 10 comprising a fluid storage compartment 32 and amouthpiece 31, wherein the mouthpiece is attached to a second end of thecartridge and further comprises at least one aerosol outlet 47.

In some embodiments, the mouthpiece 31 encloses a second end of thecartridge 30 and a second end of the fluid storage compartment 32, 32 a.

Additionally, as clearly illustrated in FIG. 10C in some embodiments themouthpiece also contains a second condensation chamber 46 prior to theaerosol outlet 47, which is formed by components of the tank body 32comprising the secondary condensation channel/chamber rails 46 b, thesecond condensation channel cover 46 a, (the outer side wall of themouthpiece). Still further, the mouthpiece may contain yet anotheraerosol outlet 47′ and another (second) condensation chamber 46′ priorto the aerosol outlet, on another side of the cartridge.

In other embodiments, the mouthpiece comprises more than one secondcondensation chamber 46, 46′.

In some preferred embodiments, the second condensation chamber is formedalong an exterior wall of the cartridge 46 b.

In each of the embodiments described herein, the cartridge 30 comprisesan airflow path comprising: an air inlet channel and passage 40, 41, 42;a heater chamber 37; at least a first condensation chamber 45; and anoutlet port 47. In some of the embodiments described herein, thecartridge 30 comprises an airflow path comprising: an air inlet channeland passage 40, 41, 42; a heater chamber 37; a first condensationchamber 45; a second condensation chamber 46; and an outlet port 47.

In still other embodiments described herein the cartridge 30 maycomprise an airflow path comprising at least one air inlet channel andpassage 40, 41, 42; a heater chamber 37; at least one first condensationchamber 45; at least one second condensation chamber 46; and at leastone outlet port 47.

In each of the embodiments described herein, the fluid storagecompartment 32 is in fluid communication with the heater 36, wherein thefluid storage compartment is capable of retaining condensed aerosolfluid.

In some embodiments of the device, the condensed aerosol fluid comprisesa nicotine formulation. In some embodiments, the condensed aerosol fluidcomprises a humectant. In some embodiments, the humectant comprisespropylene glycol. In some embodiments, the humectant comprises vegetableglycerin.

Provided herein is a cartridge 30 for a device for generating aninhalable aerosol 10 comprising: a fluid storage compartment 32; aheater 36 affixed to a first end; and a mouthpiece 31 affixed to asecond end; wherein the heater comprises a first condensation chamber 45and the mouthpiece comprises a second condensation chamber 46.

In some embodiments, the heater comprises more than one firstcondensation chamber 45, 45′ and the mouthpiece comprises more than onesecond condensation chamber 46, 46′.

In some embodiments, the first condensation chamber and the secondcondensation chamber are in fluid communication. As illustrated in FIG.10C, the first and second condensation chambers have a common transitionarea 57, 57′, for fluid communication.

In some embodiments, the mouthpiece comprises an aerosol outlet 47 influid communication with the second condensation chamber 46.

In some embodiments, the mouthpiece comprises two or more aerosoloutlets 47, 47′.

In some embodiments, the mouthpiece comprises two or more aerosoloutlets 47, 47′ in fluid communication with the two or more secondcondensation chambers 46, 46′.

In any one of the embodiments, the cartridge meets ISO recyclingstandards.

In any one of the embodiments, the cartridge meets ISO recyclingstandards for plastic waste.

And in still other embodiments, the plastic components of the cartridgeare composed of polylactic acid (PLA), wherein the PLA components arecompostable and or degradable.

Provided herein is a device for generating an inhalable aerosol 10comprising a device body 20 comprising a cartridge receptacle 21; and adetachable cartridge 30; wherein the cartridge receptacle and thedetachable cartridge form a separable coupling, and wherein theseparable coupling comprises a friction assembly, a snap-fit assembly ora magnetic assembly.

In other embodiments of the device, the cartridge is a detachableassembly. In any one of the embodiments described herein, the cartridgecomponents may comprise a snap-lock assembly such as illustrated by snapfeatures 39 a and 39 b. In any one of the embodiments, the cartridgecomponents are recyclable.

Provided herein is a method of fabricating a device for generating aninhalable aerosol comprising: providing a device body comprising acartridge receptacle; and providing a detachable cartridge; wherein thecartridge receptacle and the detachable cartridge form a separablecoupling comprising a friction assembly, a snap-fit assembly or amagnetic assembly when the cartridge is inserted into the cartridgereceptacle.

Provided herein is a method of making a device 10 for generating aninhalable aerosol comprising: providing a device body 20 with acartridge receptacle 21 comprising one or more interior couplingsurfaces 21 a, 21 b, 21 c . . . ; and further providing a cartridge 30comprising: one or more exterior coupling surfaces 36 a, 36 b, 36 c, . .. , a second end and a first end; a tank 32 comprising an interior fluidstorage compartment 32 a; at least one channel 40 on at least oneexterior coupling surface, wherein the at least one channel forms oneside of at least one air inlet passage 51, and wherein at least oneinterior wall of the cartridge receptacle forms at least one side oneside of at least one air inlet passage 51 when the detachable cartridgeis inserted into the cartridge receptacle.

FIGS. 9A-9L provide an illustrative example of a method of assemblingsuch a device.

In some embodiments of the method, the cartridge 30 is assembled with a[protective] removable end cap 38 to protect the exposed heater contacttabs 33 a protruding from the heater 36.

Provided herein is a method of fabricating a cartridge for a device forgenerating an inhalable aerosol comprising: providing a fluid storagecompartment; affixing a heater to a first end with a snap-fit coupling;and affixing a mouthpiece to a second end with a snap-fit coupling.

Provided herein is a cartridge 30 for a device for generating aninhalable aerosol 10 with an airflow path comprising: a channel 50comprising a portion of an air inlet passage 51; a second air passage 41in fluid communication with the channel; a heater chamber 37 in fluidcommunication with the second air passage; a first condensation chamber45 in fluid communication with the heater chamber; a second condensationchamber 46 in fluid communication with the first condensation chamber;and an aerosol outlet 47 in fluid communication with second condensationchamber.

Provided herein is a device 10 for generating an inhalable aerosoladapted to receive a removable cartridge 30, wherein the cartridgecomprises a fluid storage compartment [or tank] 32; an air inlet 41; aheater 36, a [protective] removable end cap 38, and a mouthpiece 31.

Charging

In some cases, the vaporization device may comprise a power source. Thepower source may be configured to provide power to a control system, oneor more heating elements, one or more sensors, one or more lights, oneor more indicators, and/or any other system on the electronic cigarettethat requires a power source. The power source may be an energy storagedevice. The power source may be a battery or a capacitor. In some cases,the power source may be a rechargeable battery.

The battery may be contained within a housing of the device. In somecases the battery may be removed from the housing for charging.Alternatively, the battery may remain in the housing while the batteryis being charged. Two or more charge contact may be provided on anexterior surface of the device housing. The two or more charge contactsmay be in electrical communication with the battery such that thebattery may be charged by applying a charging source to the two or morecharge contacts without removing the battery from the housing.

FIG. 18 shows a device 1800 with charge contacts 1801. The chargecontacts 1801 may be accessible from an exterior surface of a devicehousing 1802. The charge contacts 1801 may be in electricalcommunication with an energy storage device (e.g., battery) inside ofthe device housing 1802. In some cases, the device housing may notcomprise an opening through which the user may access components in thedevice housing. The user may not be able to remove the battery and/orother energy storage device from the housing. In order to open thedevice housing a user must destroy or permanently disengage the chargecontacts. In some cases, the device may fail to function after a userbreaks open the housing.

FIG. 19 shows an exploded view of a charging assembly 1900 in anelectronic vaporization device. The housing (not shown) has been removedfrom the exploded view in FIG. 19. The charge contact pins 1901 may bevisible on the exterior of the housing. The charge contact pins 1901 maybe in electrical communication with a power storage device of theelectronic vaporization device. When the device is connected to a powersource (e.g., during charging of the device) the charging pins mayfacilitate electrical communication between the power storage deviceinside of the electronic vaporization device and the power sourceoutside of the housing of the vaporization device. The charge contactpins 1901 may be held in place by a retaining bezel 1902. The chargecontact pins 1901 may be in electrical communication with a charger flex1903. The charging pins may contact the charger flex such that a needfor soldering of the charger pins to an electrical connection to be inelectrical communication with the power source may be eliminated. Thecharger flex may be soldered to a printed circuit board (PCB). Thecharger flex may be in electrical communication with the power storagedevice through the PCB. The charger flex may be held in place by a bentspring retainer 1904.

FIG. 20 shows the bent spring retainer in an initial position 2001 and adeflected position 2002. The bent spring retainer may hold the retainingbezel in a fixed location. The bent spring retainer may deflect only inone direction when the charging assembly is enclosed in the housing ofthe electronic vaporization device.

FIG. 21 shows a location of the charger pins 2101 when the electronicvaporization device is fully assembled with the charging pins 2101contact the charging flex 2102. When the device is fully assembled atleast a portion of the retaining bezel may be fitted in an indentation2103 on the inside of the housing 2104. In some cases, disassembling theelectronic vaporization device may destroy the bezel such that thedevice cannot be reassembled after disassembly.

A user may place the electronic smoking device in a charging cradle. Thecharging cradle may be a holder with charging contact configured to mateor couple with the charging pins on the electronic smoking device toprovide charge to the energy storage device in the electronicvaporization device from a power source (e.g., wall outlet, generator,and/or external power storage device). FIG. 22 shows a device 2302 in acharging cradle 2301. The charging cable may be connected to a walloutlet, USB, or any other power source. The charging pins (not shown) onthe device 2302 may be connected to charging contacts (not shown) on thecharging cradle 2301. The device may be configured such that when thedevice is placed in the cradle for charging a first charging pin on thedevice may contact a first charging contact on the charging cradle and asecond charging pin on the device may contact a second charging contacton the charging cradle or the first charging pin on the device maycontact a second charging contact on the charging cradle and the secondcharging pin on the device may contact the first charging contact on thecharging cradle. The charging pins on the device and the chargingcontacts on the cradle may be in contact in any orientation. Thecharging pins on the device and the charging contacts on the cradle maybe agnostic as to whether they are current inlets or outlets. Each ofthe charging pins on the device and the charging contacts on the cradlemay be negative or positive. The charging pins on the device may bereversible.

FIG. 23 shows a circuit 2400 that may permit the charging pins on thedevice to be reversible. The circuit 2400 may be provided on a PCB inelectrical communication with the charging pins. The circuit 2400 maycomprise a metal-oxide-semiconductor field-effect transistor (MOSFET) Hbridge. The MOSFET H bridge may rectify a change in voltage across thecharging pins when the charging pins are reversed from a firstconfiguration where in a first configuration the device is placed in thecradle for charging with the first charging pin on the device in contactwith the first charging contact on the charging cradle to a secondcharging pin on the device in contact with the second charging contacton the charging cradle to a second configuration where the firstcharging pin on the device is in contact with the second chargingcontact on the charging cradle and the second charging pin on the deviceis in contact with the first charging contact on the charging cradle.The MOSFET H bridge may rectify the change in voltage with an efficientcurrent path.

As shown in FIG. 23 the MOSFET H bridge may comprise two or moren-channel MOSFETs and two or more p-channel MOSFETs. The n-channel andp-channel MOSFETs may be arranged in an H bridge. Sources of p-channelsMOSFETs (Q1 and Q3) may be in electrical communication. Similarly,sources of n-channel FETs (Q2 and Q4) may be in electricalcommunication. Drains of pairs of n and p MOSFETs (Q1 with Q2 and Q3with Q4) may be in electrical communication. TA common drain from one nand p pair may be in electrical communication with one or more gates ofthe other n and p pair and/or vice versa. Charge contacts (CH1 and CH2)may be in electrical communication to common drains separately. A commonsource of the n MOSFETs may be in electrical communication to PCB ground(GND). The common source of the p MOSFETs may be in electricalcommunication with the PCB's charge controller input voltage (CH+). WhenCH1 voltage is greater than CH2 voltage by the MOSFET gate thresholdvoltages, Q1 and Q4 may be “on,” connecting CH1 to CH+ and CH2 to GND.When CH2 voltage is greater than CH1 voltage by the FET gate thresholdvoltages, Q2 and Q3 may be “on,” connecting CH1 to GND and CH2 to CH+.For example, whether there is 9V or −9V across CH1 to CH2, CH+ will be9V above GND. Alternatively, a diode bridge could be used, however theMOSFET bridge may be more efficient compared to the diode bridge.

In some cases the charging cradle may be configured to be a smartcharger. The smart charger may put the battery of the device in serieswith a USB input to charge the device at a higher current compared to atypical charging current. In some cases, the device may charge at a rateup to about 2 amps (A), 4 A, 5 A, 6 A, 7 A, 10 A, or 15 A. In somecases, the smart charger may comprise a battery, power from the batterymay be used to charge the device battery. When the battery in the smartcharger has a charge below a predetermined threshold charge, the smartcharger may simultaneously charge the battery in the smart charger andthe battery in the device.

Blow Discrimination

In any of the devices and system (e.g., vaporizers) described herein, apressure sensor may be used and configured to detect blowing and todistinguish blowing from draw (sucking/inhaling). For example, amodified electret microphone may be used as a pressure sensor connectedto the device's microcontroller so that pressure-dependent measurementscan be made by the microcontroller. The microcontroller's draw detectionalgorithm, which uses measurements of pressure sensor's capacitance todetermine the start and end of the draw, may be configured to includeblow detection and/or blow discrimination.

As mentioned above, other types of pressures sensors may be used (e.g.,MEMS pressure sensors or any other differential pressure sensor). Insuch cases the output of the sensor (which may be converted by thesensor and/or associated circuitry into a pressure value (e.g., in mmHg,atm, etc.) or it may be a raw sensor output or value (e.g., reading)such as a capacitance value in the case of a pressure sensor using acapacitive membrane, electrical value (resistive, voltage, etc.),digital value, force and/or displacement value, etc. As describedherein, this raw value may be used in the controls described (e.g.,microcontrollers) without requiring conversion to an actual pressurereading. Although the examples described herein refer to a capacitivepressure sensor having a capacitive membrane (e.g., an electretmicrophone), any other differential pressure sensor may be used insteadwith the methods and apparatuses described herein, including controllingthe baseline during a putative blow and/or draw through the mouthpieceas described in greater detail below.

Thus, any pressure sensor that can distinguish positive and negativepressure may be used. For example a pressure sensor may comprise anelectrically conductive diaphragm held in close proximity to aconductive static plate, forming an air capacitor, with both conductorsconnected to pins or pads on a circuit (e.g., PCB) opposite the staticplate side of the sensor. FIGS. 24A-24D illustrate one example of apressure sensor that is a capacitive pressure sensor. In this example,the diaphragm 2404 (shown in FIG. 24D) is mounted to a rigid thin walltube (case 2403) that is a close fit within the outer conductive case2407 of the sensor such that air cannot flow through the sensor aroundthe diaphragm. Holes 2411 in the static plate on one side of a gasketand holes 2413 in the PCB 2401 on the opposite side of the diaphragmallow pressure differences between the two sides of the sensor to beenseen by the diaphragm, which deflects with a pressure difference acrossit.

Within the vaporizer, the sensor may be included in a sealed air path soas to distinguish a difference between internal pressure and airpressure. In some variations, a gasket 2502 in the device forms anair-tight seal around the sensor's case such that the static plate sideof the sensor sees gauge pressures in the device's air path when a userdraws from or blows into the device, as shown in FIG. 25. Air flowrestriction between the device's nominal air inlet 2505 and the pressuresensor 2509 creates a pressure that the static plate side of thepressure registers. The PCB 2511 side of the pressure sensor stays at anexternal reference (e.g., 0 gauge) pressure during a draw or blow as thePCB side of the pressure sensor is not part of the air path and is notsealed from ambient air. Pressure difference on either side of thesensor resolve onto either side of the diaphragm; negative gaugepressure in the air path from a draw pulls the diaphragm towards thestatic plate, increasing the capacitance of the sensor, while positivegauge pressures in the air path from a blow push the diaphragm away fromthe static plate, decreasing the sensor's capacitance.

Differences between the pressure on either side of the diaphragm 2404and the back plate 2404 change the spacing between the diaphragm andback plate and therefore the capacitance of the sensor. This differentseparation may be read as the capacitance of the sensor and compared toambient. In some variations, capacitance is measured with an oscillatingcircuit that sources and sinks current to/from the sensor to charge anddischarge the sensor repeatedly. The device's microcontroller counts thenumber of times the sensor's intrinsic capacitor is charged anddischarged within a fixed time period (e.g., 0.5 ms, 1 ms, 1.5 ms, 2 ms,etc.) and uses this value in a draw detection algorithm. Thismeasurement may be inversely related to the capacitance of the sensor,since an increase in capacitance will make the capacitor charge slower,resulting in fewer charge and discharge cycles during the measurementperiod. So an increase in capacitance from negative air path gaugepressure, normally a draw, will result in a lower reading than when theuser is not drawing from the device. Blowing into the nominal outlet ofthe air path will result in an increase in this measured value. Actualcapacitance and air path gauge pressure are not needed by the drawdetection algorithm, so they are not calculated, though they could beapproximated and used in a similar draw detection algorithm.

In any of the apparatuses described herein, a capacitive sensing modulewithin the microcontroller may handle the oscillation and currentsourcing/sinking needed for the measurement via a direct connection tothe pressure sensor diaphragm. The pressure sensor's case may be tied toPCB ground.

Because the ambient pressure around the device may change, the‘baseline’ capacitance of the sensor may also change. This may beincorporated into the control circuitry that determines draw (and maydetermine or reject blow). For example, the draw detection algorithm mayrespond to environmental changes (not including draw or blow) that maychange the nominal pressure measurement by using a baseline pressuremeasurement value which normally follows live pressure measurementsusing a software low-pass filter. With a moving baseline, a thresholdfor detecting the start of a draw can be kept very close to the baselineand live readings for consistent sensitivity and maximum sensitivitywithout falsely detected draws. The draw detection algorithm maytherefore detect the start of a draw when the live pressure measurementdrops (indicating a pressure drop in the air path) to some thresholdbelow the baseline value for some number of measurements. The algorithmdetects end of draw when live pressure measurements rise above somethreshold below the baseline. The baseline may be fixed during the drawso that end of draw detection does not happen prematurely, and so thatsubsequent draws don't require larger pressure drops for the algorithmto detect the start of a draw.

For example, see FIG. 26, which graphically illustrates the output ofthe pressure sensor over time and when draws are detected by themicrocontroller (which is performing the control logic as describedherein). In this example, the live reading is the pressure output(converted capacitance measurement in this example) from the sensor. Thebaseline is a low-pass filtered measure of the live reading. Thisbaseline is fixed during the two draw events. Draw detection state isshown by the square wave, where the high state corresponds to a drawcurrently being detected. A first threshold is positioned at a fixedoffset below the baseline; when the live reading from the sensor (thepressure measurement) crosses the threshold (e.g., exceeds this offset),it detects a draw event, and can again detect the end of the draw eventwhen the pressure returns past the same threshold. These two thresholdsmay differ from each other in the draw detection logic (algorithm). Asimilar method may be applied to detect blowing; a second threshold orsecond offset (blow threshold/offset) maybe represented as a line on theopposite side of the baseline from the draw threshold/offset. In thisexample, draws are detected as downward pressure deflection and offset,whereas blowing is upward deflection relative to the baseline; if theorientation of the sensor is reversed, or if the raw sensor values,depending on the type of sensor, are used, the direction of blow anddraw relative to the baseline may be different.

Blowing into the device may be detected and/or ignored using thisalgorithm. For example, when the live pressure measurement rises tovalues above the baseline value (e.g., in the more positive direction inthe configuration shown in FIGS. 25, 26 and 27), which is usually causedby the user blowing into the air path outlet, the baseline may also stopfollowing the live pressure measurements (e.g., remain at the lastvalue) until the sensor output returns to below some threshold above thebaseline value, as shown in FIG. 27. Holding the baseline during ablowing event may prevent the baseline from rising to a value at whichdraw start would be detected at the end of the blow. With this feature,users can hold the device with their lips and/or teeth without worryingabout the device heating when they didn't intend for it to heat. Withoutthis feature, it the device may apparently heat on its own. Thus,preventing false draw may save, battery life and vaporizable material bypreventing detection of false draws which may occur, for example if thebaseline during a blow event were reset to higher values so that the endof the blow would drop the sensor signal to beyond the threshold (whichis an offset of the now-incorrect baseline) for detecting draw.

Thus, in general, the pressure sensor is configured to detect draw bycomparing the instantaneous sensor output (“live reading” in FIGS. 26and 27) to a baseline value which is a based on a filtered (e.g., lowpass filtered, averaged, windowed, weighted averaged, etc.) version ofthe instantaneous sensor output. Detection of draw is made more accurateby rejecting changes to the baseline during blowing (e.g., “blowrejection” or “blow discrimination”). This may be achieved by freezingthe value of the baseline when the instantaneous sensor output isgreater than the baseline or greater than some predetermined offsetabove or below (whichever direction corresponds to blowing based on theorientation of the sensor in the system) the baseline. The baselinevalue may also be frozen when the instantaneous sensor crosses athreshold for detection of draw (e.g., above or below this thresholdbased on the orientation of the sensor in the system).

In an alternative embodiment, an oscillating circuit external to themicrocontroller may be used to charge and discharge the pressuresensor's intrinsic capacitor. This circuit could be a multivibratorcircuit, relaxation oscillator, or other oscillator that isself-resonant or excited by the microcontroller. The pressure sensorcase may not be grounded. A microcontroller is still used to countcharge and discharge cycles within a fixed interval.

In an alternative embodiment, a fixed resistance may be used to chargethe pressure sensor's intrinsic capacitor. Charge time up to somevoltage or discharge time down to some voltage is measured using acomparator internal or external to the microcontroller. In this case,readings will increase with increased sensor capacitance, as opposed tooscillator charge count readings which decrease with increased sensorcapacitance, and the draw detection algorithm may be modifiedaccordingly, with increased readings required for draw start detectionand decreased readings required for blow detection.

In an alternative embodiment, the diaphragm is in between the staticplate and the air path, such that negative pressure from a draw woulddecrease the capacitance of the sensor. If the sensor is still measuredwith an oscillator, the sensor output for reading deviations frombaseline required for draw start detection and blow detection areswitched.

In an alternative embodiment, the pressure sensor has solder pads and/orlead wires instead of pins on its PCB.

In an alternative embodiment, the draw detection circuitry (e.g.,algorithm) may not detect a draw start unless it has a “stable”baseline. When a blow is detected, a flag may be set that indicates thatthe baseline is not stable. When the end of blow is detected andpressure readings stabilize, the baseline is set conservatively belowlive pressure readings and the flag for unstable baseline is cleared,meaning drops in the reading will again be detected as draw start event,similar to what is shown in FIG. 27.

Any of the methods (including user interfaces) described herein may beimplemented as software, hardware or firmware, and may be described as anon-transitory computer-readable storage medium storing a set ofinstructions capable of being executed by a processor (e.g., computer,tablet, smartphone, etc.), that when executed by the processor causesthe processor to control perform any of the steps, including but notlimited to: displaying, communicating with the user, analyzing,modifying parameters (including timing, frequency, intensity, etc.),determining, alerting, or the like.

When a feature or element is herein referred to as being “on” anotherfeature or element, it can be directly on the other feature or elementor intervening features and/or elements may also be present. Incontrast, when a feature or element is referred to as being “directlyon” another feature or element, there are no intervening features orelements present. It will also be understood that, when a feature orelement is referred to as being “connected”, “attached” or “coupled” toanother feature or element, it can be directly connected, attached orcoupled to the other feature or element or intervening features orelements may be present. In contrast, when a feature or element isreferred to as being “directly connected”, “directly attached” or“directly coupled” to another feature or element, there are nointervening features or elements present. Although described or shownwith respect to one embodiment, the features and elements so describedor shown can apply to other embodiments. It will also be appreciated bythose of skill in the art that references to a structure or feature thatis disposed “adjacent” another feature may have portions that overlap orunderlie the adjacent feature.

Terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of the invention.For example, as used herein, the singular forms “a”, “an” and “the” areintended to include the plural forms as well, unless the context clearlyindicates otherwise. It will be further understood that the terms“comprises” and/or “comprising,” when used in this specification,specify the presence of stated features, steps, operations, elements,and/or components, but do not preclude the presence or addition of oneor more other features, steps, operations, elements, components, and/orgroups thereof. As used herein, the term “and/or” includes any and allcombinations of one or more of the associated listed items and may beabbreviated as “/”.

Spatially relative terms, such as “under”, “below”, “lower”, “over”,“upper” and the like, may be used herein for ease of description todescribe one element or feature's relationship to another element(s) orfeature(s) as illustrated in the figures. It will be understood that thespatially relative terms are intended to encompass differentorientations of the device in use or operation in addition to theorientation depicted in the figures. For example, if a device in thefigures is inverted, elements described as “under” or “beneath” otherelements or features would then be oriented “over” the other elements orfeatures. Thus, the exemplary term “under” can encompass both anorientation of over and under. The device may be otherwise oriented(rotated 90 degrees or at other orientations) and the spatially relativedescriptors used herein interpreted accordingly. Similarly, the terms“upwardly”, “downwardly”, “vertical”, “horizontal” and the like are usedherein for the purpose of explanation only unless specifically indicatedotherwise.

Although the terms “first” and “second” may be used herein to describevarious features/elements (including steps), these features/elementsshould not be limited by these terms, unless the context indicatesotherwise. These terms may be used to distinguish one feature/elementfrom another feature/element. Thus, a first feature/element discussedbelow could be termed a second feature/element, and similarly, a secondfeature/element discussed below could be termed a first feature/elementwithout departing from the teachings of the present invention.

Throughout this specification and the claims which follow, unless thecontext requires otherwise, the word “comprise”, and variations such as“comprises” and “comprising” means various components can be co-jointlyemployed in the methods and articles (e.g., compositions and apparatusesincluding device and methods). For example, the term “comprising” willbe understood to imply the inclusion of any stated elements or steps butnot the exclusion of any other elements or steps.

In general, any of the apparatuses and methods described herein shouldbe understood to be inclusive, but all or a sub-set of the componentsand/or steps may alternatively be exclusive, and may be expressed as“consisting of” or alternatively “consisting essentially of” the variouscomponents, steps, sub-components or sub-steps.

As used herein in the specification and claims, including as used in theexamples and unless otherwise expressly specified, all numbers may beread as if prefaced by the word “about” or “approximately,” even if theterm does not expressly appear. The phrase “about” or “approximately”may be used when describing magnitude and/or position to indicate thatthe value and/or position described is within a reasonable expectedrange of values and/or positions. For example, a numeric value may havea value that is +/−0.1% of the stated value (or range of values), +/−1%of the stated value (or range of values), +/−2% of the stated value (orrange of values), +/−5% of the stated value (or range of values), +/−10%of the stated value (or range of values), etc. Any numerical valuesgiven herein should also be understood to include about or approximatelythat value, unless the context indicates otherwise. For example, if thevalue “10” is disclosed, then “about 10” is also disclosed. Anynumerical range recited herein is intended to include all sub-rangessubsumed therein. It is also understood that when a value is disclosedthat “less than or equal to” the value, “greater than or equal to thevalue” and possible ranges between values are also disclosed, asappropriately understood by the skilled artisan. For example, if thevalue “X” is disclosed the “less than or equal to X” as well as “greaterthan or equal to X” (e.g., where X is a numerical value) is alsodisclosed. It is also understood that the throughout the application,data is provided in a number of different formats, and that this data,represents endpoints and starting points, and ranges for any combinationof the data points. For example, if a particular data point “10” and aparticular data point “15” are disclosed, it is understood that greaterthan, greater than or equal to, less than, less than or equal to, andequal to 10 and 15 are considered disclosed as well as between 10 and15. It is also understood that each unit between two particular unitsare also disclosed. For example, if 10 and 15 are disclosed, then 11,12, 13, and 14 are also disclosed.

Although various illustrative embodiments are described above, any of anumber of changes may be made to various embodiments without departingfrom the scope of the invention as described by the claims. For example,the order in which various described method steps are performed mayoften be changed in alternative embodiments, and in other alternativeembodiments one or more method steps may be skipped altogether. Optionalfeatures of various device and system embodiments may be included insome embodiments and not in others. Therefore, the foregoing descriptionis provided primarily for exemplary purposes and should not beinterpreted to limit the scope of the invention as it is set forth inthe claims.

The examples and illustrations included herein show, by way ofillustration and not of limitation, specific embodiments in which thesubject matter may be practiced. As mentioned, other embodiments may beutilized and derived there from, such that structural and logicalsubstitutions and changes may be made without departing from the scopeof this disclosure. Such embodiments of the inventive subject matter maybe referred to herein individually or collectively by the term“invention” merely for convenience and without intending to voluntarilylimit the scope of this application to any single invention or inventiveconcept, if more than one is, in fact, disclosed. Thus, althoughspecific embodiments have been illustrated and described herein, anyarrangement calculated to achieve the same purpose may be substitutedfor the specific embodiments shown. This disclosure is intended to coverany and all adaptations or variations of various embodiments.Combinations of the above embodiments, and other embodiments notspecifically described herein, will be apparent to those of skill in theart upon reviewing the above description.

What is claimed is:
 1. A vaporizer device comprising: a reservoirconfigured to hold a vaporizable material; a heater configured to heatthe vaporizable material; a mouthpiece in communication with thereservoir; a pressure sensor configured to output instantaneous sensorreadings; and a microcontroller, wherein the microcontroller isconfigured to: determine a baseline based on filtering the instantaneoussensor readings; hold the baseline at a prior value of the baselinewhile the instantaneous sensor readings are above the baseline by afirst offset value or below the baseline by a second offset value;compare the instantaneous sensor readings to the baseline and activatethe heater to generate vapor from the vaporizable material when theinstantaneous sensor readings are offset from the baseline by more thana third offset value indicating suction is being applied to themouthpiece.
 2. The device of claim 1, wherein a first side of thepressure sensor is exposed to a first air path through the mouthpieceand a second side of the pressure sensor is exposed to a second air pathopen to ambient pressure, and wherein the second air path is sealed fromthe first air path by a gasket around the pressure sensor.
 3. The deviceof claim 1, wherein the third offset value is the same as the secondoffset value.
 4. The device of claim 1, wherein the third offset valueis the same as the first offset value.
 5. The device of claim 1, whereinthe first offset value is zero.
 6. The device of claim 1, wherein thesecond offset value is zero.
 7. The device of claim 1, wherein thepressure sensor comprise a capacitive membrane.
 8. The devices of claim1, wherein the pressure sensor comprises a MEMS pressure sensor.
 9. Thedevice of claim 1, wherein the instantaneous pressure sensor output is acapacitance.
 10. The device of claim 1, wherein the instantaneouspressure sensor output is a pressure.
 11. The device of claim 1, whereinthe microcontroller is configured to determine the baseline based onfiltering the instantaneous sensor output by low pass filtering theinstantaneous sensor output.
 12. The device of claim 1, wherein themicrocontroller is configured to determine the baseline based onfiltering the instantaneous sensor output by taking a running average ofthe instantaneous sensor output.
 13. The device of claim 1, wherein themicrocontroller is further configured to stop activating the heater togenerate vapor when the instantaneous sensor output is offset from thebaseline by less than the third offset value.
 14. A vaporizer devicecomprising: a reservoir configured to hold a vaporizable material; aheater configured to heat the vaporizable material; a mouthpiece incommunication with the reservoir; a pressure sensor comprisingconfigured to output instantaneous sensor readings; and amicrocontroller, wherein the microcontroller is configured to: determinea baseline based on filtering the instantaneous sensor readings; holdthe baseline at a prior value of the baseline while the instantaneoussensor readings are above the baseline by a first offset value or belowthe baseline by a second offset value; compare the instantaneous sensorreadings to the baseline and activate the heater to generate vapor fromthe vaporizable material when the instantaneous sensor readings areabove the baseline by more than a third offset value indicating suctionis being applied to the mouthpiece.
 15. A method of controlling avaporizer device to prevent heating after blowing on a mouthpiece of thevaporizer device, the method comprising: taking instantaneous sensorreadings from a pressure sensor in the vaporizer device, wherein thepressure sensor comprises a differential pressure sensor; determining abaseline by filtering the instantaneous sensor readings; holding thebaseline at a prior value of the baseline while the instantaneous sensorreadings are above the baseline by a first offset value; holding thebaseline at a prior value of the baseline while the instantaneous sensorreadings are below the baseline by a second offset value; comparing theinstantaneous sensor readings to the baseline and activating a heater inthe vaporizer to generate vapor from a vaporizable material when theinstantaneous sensor output is offset from the baseline by more than athird offset value, indicating that suction is being applied to themouthpiece.
 16. The method of claim 15, wherein the third offset valueis the same as the second offset value.
 17. The method of claim 15,wherein the third offset value is the same as the first offset value.18. The method of claim 15, wherein the first offset value is zero. 19.The method of claim 15, wherein the second offset value is zero.
 20. Themethod of claim 15, wherein the instantaneous pressure sensor reading isa capacitance.
 21. The method of claim 15, wherein the instantaneouspressure sensor reading is a pressure.
 22. The method of claim 15,wherein determining comprising determining the baseline based onfiltering the instantaneous sensor readings by low pass filtering theinstantaneous sensor readings.
 23. The method of claim 15, whereindetermining comprising determining the baseline based on filtering theinstantaneous sensor readings by taking a running average of theinstantaneous sensor readings.
 24. The method of claim 15, furthercomprising stopping activating the heater to generate vapor when theinstantaneous sensor readings are offset from the baseline by less thanthe third offset value.
 25. A method of controlling a vaporizer deviceto prevent heating after blowing on a mouthpiece of the vaporizerdevice, the method comprising: taking instantaneous sensor readings froma pressure sensor in the vaporizer device; determining a baseline byfiltering the instantaneous sensor readings; holding the baseline at aprior value of the baseline while the instantaneous sensor readings areabove the baseline; holding the baseline at a prior value of thebaseline while the instantaneous sensor readings are below the baselineby an offset value; comparing the instantaneous sensor readings to thebaseline and activating a heater in the vaporizer to generate vapor froma vaporizable material when the instantaneous sensor output is below thebaseline by more than the offset value indicating that suction is beingapplied to the mouthpiece.